diff --git a/CHANGELOG.md b/CHANGELOG.md
index c104be29599..f250548856c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@
 
  - Removed lingering console.log statements
 
+### sandy
+
+#### Changed
+
+ - Migrated the `waistbandWidth` option from mm to snapped pct
+
 ### titan
 
 #### Changed
diff --git a/config/changelog.yaml b/config/changelog.yaml
index 082d0efdbfa..fd8ec3ce85b 100644
--- a/config/changelog.yaml
+++ b/config/changelog.yaml
@@ -9,6 +9,8 @@ unreleased:
       - Migrated the `waistbandWidth` option from mm to snapped pct
     trayvon:
       - Migrated the `knotWidth` and `tipWidth` options from mm to snapped pct
+    sandy:
+      - Migrated the `waistbandWidth` option from mm to snapped pct
 
 2.19.1:
   date: 2021-10-23
diff --git a/packages/sandy/CHANGELOG.md b/packages/sandy/CHANGELOG.md
index fbca38d2568..991a6102151 100644
--- a/packages/sandy/CHANGELOG.md
+++ b/packages/sandy/CHANGELOG.md
@@ -1,6 +1,12 @@
 # Change log for: @freesewing/sandy
 
 
+## unreleased (NaN-NaN-NaN)
+
+### Changed
+
+ - Migrated the `waistbandWidth` option from mm to snapped pct
+
 ## 2.16.1 (2021-05-30)
 
 ### Changed
diff --git a/packages/sandy/config/index.js b/packages/sandy/config/index.js
index 0988eeaa3cb..62569934f9d 100644
--- a/packages/sandy/config/index.js
+++ b/packages/sandy/config/index.js
@@ -1,4 +1,7 @@
 import { version } from '../package.json'
+import { elastics } from '@freesewing/snapseries'
+import freesewing from '@freesewing/core'
+const { pctBasedOn } = freesewing
 
 export default {
   name: 'sandy',
@@ -24,10 +27,8 @@ export default {
     // Bool
     seamlessFullCircle: { bool: false },
 
-    // Millimeter
-    waistbandWidth: { mm: 40, min: 5, max: 150 },
-
     // Percentages
+    waistbandWidth: { pct: 4, min: 1, max: 8, snap: elastics, ...pctBasedOn('waistToFloor') },
     waistbandPosition: { pct: 50, min: 0, max: 100 },
     lengthBonus: { pct: 50, min: 10, max: 100 },
     circleRatio: { pct: 50, min: 20, max: 100 },
diff --git a/packages/sandy/src/curved-waistband.js b/packages/sandy/src/curved-waistband.js
index 4e81812b420..04c19da2fcf 100644
--- a/packages/sandy/src/curved-waistband.js
+++ b/packages/sandy/src/curved-waistband.js
@@ -19,22 +19,23 @@ export default function (part) {
     complete,
     paperless,
     macro,
+    absoluteOptions,
   } = part.shorthand()
 
   // Calculate the angle of the ring sector and the radius of the upper arc
   const an =
     utils.rad2deg(store.get('bottomCircumference') - store.get('topCircumference')) /
-    options.waistbandWidth
+    absuluteOptions.waistbandWidth
 
   const rad = store.get('topCircumference') / utils.deg2rad(an)
 
   // Extra angle to extend the waistband to overlap according to waistbandOverlap
-  const anExtra = utils.rad2deg(store.get('waistbandOverlap') / (rad + options.waistbandWidth))
+  const anExtra = utils.rad2deg(store.get('waistbandOverlap') / (rad + absoluteOptions.waistbandWidth))
 
   // The curved waistband is shown with no rotation
   const rot = 0
   // Call draftRingSector to draft the part
-  paths.seam = draftRingSector(part, rot, an + anExtra, rad, rad + options.waistbandWidth).attr(
+  paths.seam = draftRingSector(part, rot, an + anExtra, rad, rad + absoluteOptions.waistbandWidth).attr(
     'class',
     'fabric'
   )
diff --git a/packages/sandy/src/skirt.js b/packages/sandy/src/skirt.js
index 9a02f1e4e24..0f5c963e671 100644
--- a/packages/sandy/src/skirt.js
+++ b/packages/sandy/src/skirt.js
@@ -15,6 +15,7 @@ export default function (part) {
     complete,
     paperless,
     macro,
+    absoluteOptions,
   } = part.shorthand()
 
   // Circumference of the top of the waistband, calculated from the waistbandPosition option
@@ -29,7 +30,7 @@ export default function (part) {
     store.set(
       'bottomCircumference',
       store.get('topCircumference') +
-        (options.waistbandWidth * (measurements.hips - measurements.waist)) /
+        (absoluteOptions.waistbandWidth * (measurements.hips - measurements.waist)) /
           measurements.waistToHips
     )
   } else {
@@ -83,7 +84,7 @@ export default function (part) {
    * arc with the length of the skirt added
    */
   let radiusHem =
-    radiusWaist + store.get('fullLength') * options.lengthBonus - options.waistbandWidth
+    radiusWaist + store.get('fullLength') * options.lengthBonus - absoluteOptions.waistbandWidth
 
   /**
    * The ring sector will be rotated an angle an/2 so we
diff --git a/packages/sandy/src/straight-waistband.js b/packages/sandy/src/straight-waistband.js
index 08b37fbcd42..b3050e967d3 100644
--- a/packages/sandy/src/straight-waistband.js
+++ b/packages/sandy/src/straight-waistband.js
@@ -16,6 +16,7 @@ export default function (part) {
     complete,
     paperless,
     macro,
+    absoluteOptions,
   } = part.shorthand()
 
   // Calculate the corners of the rectangle and other auxiliar points
@@ -25,8 +26,8 @@ export default function (part) {
     store.get('topCircumference') / 2 + store.get('waistbandOverlap'),
     0
   )
-  points.topRight = points.centerRight.shift(90, options.waistbandWidth)
-  points.topLeft = points.centerLeft.shift(90, options.waistbandWidth)
+  points.topRight = points.centerRight.shift(90, absoluteOptions.waistbandWidth)
+  points.topLeft = points.centerLeft.shift(90, absoluteOptions.waistbandWidth)
   points.bottomRight = points.topRight.flipY()
   points.bottomLeft = points.topLeft.flipY()