diff --git a/src/interface/Settings.js b/src/interface/Settings.js
index 8fbfa90..b97d634 100644
--- a/src/interface/Settings.js
+++ b/src/interface/Settings.js
@@ -147,7 +147,7 @@ class Settings extends React.Component {
               <TextField name="settings.outerInfill.speed" fullWidth floatingLabelText="Speed" type="number" />
               <TextField name="settings.outerInfill.flowRate" fullWidth floatingLabelText="Flow rate" type="number" />
               <p>Brim</p>
-              <TextField name="settings.brim.offset" fullWidth floatingLabelText="Offset" type="number" />
+              <TextField name="settings.brim.size" fullWidth floatingLabelText="Size" type="number" />
               <TextField name="settings.brim.speed" fullWidth floatingLabelText="Speed" type="number" />
               <TextField name="settings.brim.flowRate" fullWidth floatingLabelText="Flow rate" type="number" />
               <p>First layer</p>
diff --git a/src/settings/default.yml b/src/settings/default.yml
index ad4daff..df5f42e 100644
--- a/src/settings/default.yml
+++ b/src/settings/default.yml
@@ -44,7 +44,7 @@ outerInfill:
   flowRate: 1.0
   speed: 50.0
 brim:
-  offset: 4.0
+  size: 4.0
   flowRate: 1.0
   speed: 40.0
 firstLayer:
diff --git a/src/sliceActions/addBrim.js b/src/sliceActions/addBrim.js
index 122f140..f3e7627 100644
--- a/src/sliceActions/addBrim.js
+++ b/src/sliceActions/addBrim.js
@@ -4,21 +4,33 @@ import { PRECISION } from '../constants.js';
 const offsetOptions = {
   jointType: 'jtRound',
   miterLimit: 2.0,
-  roundPrecision: 0.25
+  roundPrecision: 0.25,
+  endType: 'etClosedPolygon'
 };
 
 export default function addBrim(slices, settings) {
   let {
-    brim: { offset: brimOffset }
+    brim: { size: brimSize },
+    nozzleDiameter
   } = settings;
-  brimOffset /= PRECISION;
+
+  nozzleDiameter /= PRECISION;
+  brimSize /= PRECISION;
+  const nozzleRadius = nozzleDiameter / 2;
 
   const [firstLayer] = slices;
 
-  firstLayer.brim = firstLayer.parts.reduce((brim, { shape }) => (
-    brim.join(shape.offset(brimOffset, {
+  const brim = firstLayer.parts.reduce((brim, { shape }) => (
+    brim.join(shape.offset(nozzleRadius, {
       ...offsetOptions,
       endType: shape.closed ? 'etClosedPolygon' : 'etOpenRound'
     }))
   ), new Shape([], true)).simplify('pftNonZero');
+
+  firstLayer.brim = new Shape([], true);
+
+  for (let offset = 0; offset < brimSize; offset += nozzleDiameter) {
+    const brimPart = brim.offset(offset, offsetOptions);
+    firstLayer.brim = firstLayer.brim.join(brimPart);
+  }
 }