fix(snapseries): Add imperial zipper lengths

packages/snapseries/src/index.mjs

@@ -1,9 +1,24 @@
+const inchesToMm = (i) => (Array.isArray(i) ? i.map((x) => x * 25.4) : i * 25.4)
+
 // Common width for elastics
 export const elastics = {
   metric: [3.5, 5, 10, 12, 20, 25, 30, 40, 50, 60, 80, 100, 120],
-  imperial: [
-    3.175, 6.35, 9.525, 12.7, 15.875, 19.05, 25.4, 31.75, 38.1, 44.45, 50.8, 76.2, 101.6, 127,
-  ],
+  imperial: inchesToMm([
+    1 / 8,
+    1 / 4,
+    3 / 8,
+    1 / 2,
+    5 / 8,
+    3 / 4,
+    1,
+    1 + 1 / 4,
+    1 + 1 / 2,
+    1 + 3 / 4,
+    2,
+    3,
+    4,
+    5,
+  ]),
 }
 
 // Common length for zippers
@@ -12,7 +27,9 @@ export const zippers = {
     80, 100, 120, 140, 150, 160, 180, 200, 220, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700,
     750, 800, 900, 1000, 1100, 1200,
   ],
-  imperial: 25.4,
+  imperial: inchesToMm([
+    3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 28, 30, 36, 42, 48, 60, 80,
+  ]),
 }
 
 // Snap to small steps (~1mm)