diff --git a/example/index.story.js b/example/index.story.js
index 285c253..49ce949 100644
--- a/example/index.story.js
+++ b/example/index.story.js
@@ -25,7 +25,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: [{ type: 'title', value: 'Wagtail is awesome!' }]
     };
-    return <StreamField {...props} id='stream-1' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('1 open block type', () => {
     const props = {
@@ -41,7 +41,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: [{ type: 'title', value: 'Wagtail is awesome!' }]
     };
-    return <StreamField {...props} id='stream-2' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('1 static block type', () => {
     const props = {
@@ -55,7 +55,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: [{ type: 'static' }]
     };
-    return <StreamField {...props} id='stream-3' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('1 block type, default value', () => {
     const props = {
@@ -71,7 +71,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: [{ type: 'title', value: 'Wagtail is awesome!' }]
     };
-    return <StreamField {...props} id='stream-4' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('1 block type, custom per-value HTML', () => {
     const props = {
@@ -94,7 +94,7 @@ storiesOf('React StreamField demo', module)
         { type: 'title', value: 'This time, no custom HTML.' }
       ]
     };
-    return <StreamField {...props} id='stream-5' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('2 block types', () => {
     const props = {
@@ -118,7 +118,7 @@ storiesOf('React StreamField demo', module)
         { type: 'text', value: 'And it’s always getting better 😃' }
       ]
     };
-    return <StreamField {...props} id='stream-6' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('List block, 1 child block type', () => {
     const props = {
@@ -142,7 +142,7 @@ storiesOf('React StreamField demo', module)
       ]
     };
 
-    return <StreamField {...props} id='stream-7' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('List block, 1 child block type, default value', () => {
     const props = {
@@ -161,7 +161,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: []
     };
-    return <StreamField {...props} id='stream-8' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('List block, 1 child block type, custom HTML', () => {
     const props = {
@@ -181,7 +181,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: []
     };
-    return <StreamField {...props} id='stream-9' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('List block, 2 children block types with groups', () => {
     const props = {
@@ -228,7 +228,7 @@ storiesOf('React StreamField demo', module)
         }
       ]
     };
-    return <StreamField {...props} id='stream-10' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Simple block layout', () => {
     const props = {
@@ -261,7 +261,7 @@ storiesOf('React StreamField demo', module)
         { type: 'static' }
       ]
     };
-    return <StreamField {...props} id='stream-11' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Mixed block layouts', () => {
     const props = {
@@ -293,7 +293,20 @@ storiesOf('React StreamField demo', module)
         { type: 'static' }
       ]
     };
-    return <StreamField {...props} id='stream-12' />;
+    return <StreamField {...props} id='stream' />;
+  })
+  .add('Gutter of add buttons', () => {
+    const props = {
+      required: true,
+      gutteredAdd: true,
+      blockDefinitions: [
+        {
+          key: 'text',
+        }
+      ],
+      value: []
+    };
+    return <StreamField {...props} id='stream' />
   })
   .add('Maximum number of blocks', () => {
     const props = {
@@ -319,7 +332,7 @@ storiesOf('React StreamField demo', module)
         }
       ]
     };
-    return <StreamField {...props} id='stream-13' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Error in one of the nested blocks', () => {
     const props = {
@@ -345,7 +358,7 @@ storiesOf('React StreamField demo', module)
         }
       ]
     };
-    return <StreamField {...props} id='stream-14' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Struct block', () => {
     const props = {
@@ -366,7 +379,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: []
     };
-    return <StreamField {...props} id='stream-15' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Struct block with default value', () => {
     const props = {
@@ -390,7 +403,7 @@ storiesOf('React StreamField demo', module)
       value: []
     };
 
-    return <StreamField {...props} id='stream-16' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Struct block with custom HTML', () => {
     const props = {
@@ -413,7 +426,7 @@ storiesOf('React StreamField demo', module)
       ],
       value: []
     };
-    return <StreamField {...props} id='stream-17' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Struct block as a struct block field', () => {
     const props = {
@@ -449,7 +462,7 @@ storiesOf('React StreamField demo', module)
         }
       ]
     };
-    return <StreamField {...props} id='stream-18' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('StructBlock as a list block child', () => {
     const props = {
@@ -477,10 +490,10 @@ storiesOf('React StreamField demo', module)
       ],
       value: []
     };
-    return <StreamField {...props} id='stream-19' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('Complex nested StreamField', () => {
-    return <StreamField {...complexNestedStreamField} id='stream-20' />;
+    return <StreamField {...complexNestedStreamField} id='stream' />;
   })
   .add('Custom action icons', () => {
     const props = {
@@ -504,7 +517,7 @@ storiesOf('React StreamField demo', module)
       value: [{ type: 'title', value: 'Wagtail is awesome!' }]
     };
 
-    return <StreamField {...props} id='stream-21' />;
+    return <StreamField {...props} id='stream' />;
   })
   .add('JavaScript widget', () => {
     const props = {
@@ -520,5 +533,5 @@ storiesOf('React StreamField demo', module)
       ],
       value: [],
     };
-    return <StreamField {...props} id="stream-22" />;
+    return <StreamField {...props} id="stream" />;
   });
diff --git a/src/Block.js b/src/Block.js
index 637e030..6ed21ff 100644
--- a/src/Block.js
+++ b/src/Block.js
@@ -171,15 +171,13 @@ class Block extends React.Component {
       );
     }
     return (
-      <>
-        <AnimateHeight className="draggable-container"
-                   height={this.draggableHeight}
-                   onAnimationEnd={this.onDraggableContainerAnimationEnd}>
-          {this.wrapSortable(blockContent)}
-        </AnimateHeight>
+      <AnimateHeight className="draggable-container"
+                     height={this.draggableHeight}
+                     onAnimationEnd={this.onDraggableContainerAnimationEnd}>
+        {this.wrapSortable(blockContent)}
         <AddButton fieldId={fieldId} parentId={parentId} blockId={id}
                    visible={canAdd} />
-      </>
+      </AnimateHeight>
     );
   }
 }
diff --git a/src/BlocksContainer.js b/src/BlocksContainer.js
index 513d696..e239021 100644
--- a/src/BlocksContainer.js
+++ b/src/BlocksContainer.js
@@ -1,5 +1,6 @@
 import React from 'react';
 import PropTypes from 'prop-types';
+import classNames from 'classnames';
 import {connect} from 'react-redux';
 import {Droppable} from 'react-beautiful-dnd';
 import Block from './Block';
@@ -31,6 +32,7 @@ import {getNestedBlockDefinition, isNA} from './processing/utils';
   }
   return {
     minNum, maxNum,
+    gutteredAdd: fieldData.gutteredAdd,
     blocksIds: blocksIds,
   };
 })
@@ -52,16 +54,8 @@ class BlocksContainer extends React.Component {
     );
   }
 
-  static getClassName(snapshot) {
-    let className = 'children-container';
-    if (snapshot.isDraggingOver) {
-      className += ' is-dragging';
-    }
-    return className;
-  }
-
   render() {
-    const {fieldId, id, blocksIds, maxNum} = this.props;
+    const {fieldId, id, blocksIds, maxNum, gutteredAdd} = this.props;
     const droppableId = `${fieldId}-${id}`;
     const num = blocksIds.length;
     const canAdd = num < maxNum;
@@ -69,7 +63,10 @@ class BlocksContainer extends React.Component {
       <Droppable droppableId={droppableId} type={droppableId}>
         {(provided, snapshot) => (
           <div ref={provided.innerRef}
-               className={BlocksContainer.getClassName(snapshot)}>
+               className={classNames(
+                 'children-container',
+                 snapshot.isDraggingOver && 'is-dragging',
+                 gutteredAdd && 'guttered-add')}>
             <AddButton fieldId={fieldId} parentId={id}
                        open={blocksIds.length === 0} visible={canAdd} />
             {blocksIds.map(blockId => this.renderBlock(blockId, canAdd))}
diff --git a/src/StreamField.js b/src/StreamField.js
index e2357ad..3deef57 100644
--- a/src/StreamField.js
+++ b/src/StreamField.js
@@ -112,6 +112,7 @@ class StreamField extends React.Component {
       duplicate: PropTypes.string,
       delete: PropTypes.string,
     }),
+    gutteredAdd: PropTypes.bool,
     blockDefinitions: PropTypes.arrayOf(BlockDefinitionType).isRequired,
     value: PropTypes.arrayOf(BlockValueType).isRequired,
   };
@@ -145,15 +146,15 @@ class StreamField extends React.Component {
 
   componentDidMount() {
     const {
-      initializeStreamField, required, minNum, maxNum, blockDefinitions, value,
+      initializeStreamField, required, minNum, maxNum, gutteredAdd,
+      blockDefinitions, value,
     } = this.props;
     const defaultProps = StreamFieldDefaultProps;
     const icons = {...defaultProps.icons, ...this.props.icons};
     const labels = {...defaultProps.labels, ...this.props.labels};
     initializeStreamField({
-      required, minNum, maxNum, icons, labels, blockDefinitions,
-      isMobile: getIsMobile(),
-      value,
+      required, minNum, maxNum, icons, labels, gutteredAdd,
+      blockDefinitions, isMobile: getIsMobile(), value,
     });
     window.addEventListener('resize', this.onWindowResize);
   }
diff --git a/src/index.scss b/src/index.scss
index 64b32b7..64a242d 100644
--- a/src/index.scss
+++ b/src/index.scss
@@ -1,7 +1,7 @@
 $grid-gutter-width: 30px;
 $header-padding: 8px;
-$block-vertical-margin: 3px;
-$block-full-margin: $block-vertical-margin 0;
+$block-vertical-padding: 3px;
+$block-full-padding: $block-vertical-padding 0;
 $add-button-size: 34px;
 $add-button-font-size: 28px;
 $children-container-padding: $add-button-size / 2;
@@ -21,18 +21,25 @@ $error-border-color: #dbc7c8;
 $error-border-color-focus: #cdb2b3;
 $error-background-color: #fbefef;
 $screen-xs-max: 799px;
+$screen-sm-min: 800px;
 
 .children-container {
   position: relative;
   padding: $children-container-padding 0
-           $children-container-padding $add-button-size;
+           $children-container-padding 0;
   transition: padding $hover-transition-duration ease-in-out;
-  @media (max-width: $screen-xs-max) {
-    padding-left: 0;
-    padding-top: $children-container-padding + $add-button-size;
+  &.guttered-add {
+    @media (min-width: $screen-sm-min) {
+      padding-left: $add-button-size;
+      button.add {
+        position: absolute;
+        width: $add-button-size;
+        transform: translate(-100%, -50%);
+      }
+    }
   }
   &.is-dragging {
-    > button.add.visible {
+    button.add.visible {
       opacity: 0;
       pointer-events: none;
     }
@@ -40,10 +47,7 @@ $screen-xs-max: 799px;
   .block {
     position: relative;
     display: flex;
-    margin: $block-full-margin;
-    @media (max-width: $screen-xs-max) {
-      margin-bottom: $block-vertical-margin + $add-button-size;
-    }
+    padding: $block-full-padding;
     &.has-error {
       > .block-container {
         border-color: $error-border-color;
@@ -209,15 +213,13 @@ $screen-xs-max: 799px;
     }
   }
   button.add {
-    position: absolute;
-    width: $add-button-size;
+    width: 100%;
     height: $add-button-size;
     appearance: none;
     border: none;
     color: $teal;
     font-weight: bold;
     background: none;
-    transform: translate(-100%, -50%);
     padding: 0;
     cursor: pointer;
     outline: none;
@@ -231,10 +233,6 @@ $screen-xs-max: 799px;
       opacity: 1;
       pointer-events: unset;
     }
-    @media (max-width: $screen-xs-max) {
-      width: 100%;
-      transform: translate(0, -100%);
-    }
     i {
       display: block;
       transition: transform $add-transition-duration $bounce-transition-timing;
diff --git a/src/reducer.js b/src/reducer.js
index b4a624d..fcbc8be 100644
--- a/src/reducer.js
+++ b/src/reducer.js
@@ -21,13 +21,14 @@ export default (state=initialState, action) => {
     case 'INITIALIZE_STREAM_FIELD': {
       const data = deepCopy(action.data);
       const {
-        required, minNum, maxNum, icons, labels, blockDefinitions, isMobile,
-        value,
+        required, minNum, maxNum, icons, labels, gutteredAdd,
+        blockDefinitions, isMobile, value,
       } = data;
       state = {
         ...state,
         [action.id]: {
-          required, minNum, maxNum, icons, labels, blockDefinitions, isMobile,
+          required, minNum, maxNum, icons, labels, gutteredAdd,
+          blockDefinitions, isMobile,
         },
       };
       return valueToState(state, action.id, value);