Pattern Sizing Calculator — Find Your Sewing Pattern Size

This calculator compares your raw body measurements against the standard Big-4 pattern body-measurement chart (Vogue, Simplicity, Butterick and McCall's all share it). It finds the right size for each measurement area (bust, waist, hip). The pattern already contains wearing ease, so you choose your size from your body measurements — never from your high-street shop size, which runs larger due to size inflation.

Standard Pattern Sizes — body measurements (cm)

• Size 8: Bust 80, Waist 61, Hip 85
• Size 10: Bust 83, Waist 64, Hip 88
• Size 12: Bust 87, Waist 67, Hip 92
• Size 14: Bust 92, Waist 71, Hip 97
• Size 16: Bust 97, Waist 76, Hip 102
• Size 18: Bust 102, Waist 81, Hip 107

Note the grade is uneven (about 2–5 cm per size), unlike a high-street chart's flat 4 cm steps — that is exactly why a pattern size 12 has a smaller bust (87 cm) than a shop size 12.