Seam Allowances Quick Reference Guide
Authentic reference chart and data matrix for Seam Allowances in Sewing & Quilting. Use the interactive table below or print it / save it as a PDF with the button below.
Quick-Reference Table
The full data from this cheat sheet, right on the page.
| Bed / Quilt Size Category | Standard Mattress Dimensions (W x L) | Standard Quilt Size (W x L) | Drop Length (Sides & Foot) | Fabric Yardage Estimate (44" Wide) |
|---|---|---|---|---|
| Crib / Toddler | 28" x 52" (71 x 132 cm) | 36" x 52" (91 x 132 cm) | 4" to 6" Drop | 1.5 – 2 Yards |
| Twin Mattress | 39" x 75" (99 x 191 cm) | 70" x 90" (178 x 229 cm) | 15" Drop each side | 5.5 – 6 Yards |
| Full / Double | 54" x 75" (137 x 191 cm) | 84" x 90" (213 x 229 cm) | 15" Drop each side | 6.5 – 7 Yards |
| Queen Mattress | 60" x 80" (152 x 203 cm) | 90" x 100" (229 x 254 cm) | 15" Drop each side | 8 – 8.5 Yards |
| King Mattress | 76" x 80" (193 x 203 cm) | 108" x 100" (274 x 254 cm) | 16" Drop each side | 9.5 – 10 Yards |
| California King | 72" x 84" (183 x 213 cm) | 104" x 104" (264 x 264 cm) | 16" Drop each side | 9.5 – 10 Yards |
How to Use This Chart
Pin this chart where you work: it packs 6 entries and 5 columns (Bed / Quilt Size Category, Standard Mattress Dimensions (W x L), Standard Quilt Size (W x L), Drop Length (Sides & Foot), Fabric Yardage Estimate (44" Wide)) into one printable page, built for quick lookups.
Scan down the Bed / Quilt Size Category column to your item, then read across for Standard Mattress Dimensions (W x L), Standard Quilt Size (W x L).
Example: for Crib / Toddler, the chart gives Standard Mattress Dimensions (W x L) of 28" x 52" (71 x 132 cm).
- Compare values down a single column to spot the pattern before you commit to a choice.
- When two rows look close, the Fabric Yardage Estimate (44" Wide) column usually breaks the tie.
- Print it once and keep it where you work — that's the whole point of a cheat sheet.
Printable Sheet Preview
High-Contrast Layout
Download Your Free Printable Sheet
Download the printable PDF below. It is the same sheet shown in the preview above, ready to print on US Letter or A4 — open it and choose Print, with Scale set to Fit to Page.
💡 Pro Printing Tip: In your printer settings, set Scale to “Fit to Printable Area” and enable “Background Graphics” for color headers.