Clothing Size Converter Formula

Understand the math behind the clothing size converter. Each variable explained with a worked example.

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Formulas Used

UK Size

uk_size = us_size + 4

EU Size

eu_size = us_size + 30

Letter Size Index

xs_to_xl = us_size <= 2 ? 1 : (us_size <= 6 ? 2 : (us_size <= 10 ? 3 : (us_size <= 14 ? 4 : 5)))

Variables

VariableDescriptionDefault
us_sizeUS Women Size8

How It Works

Clothing Size Conversion (Women)

Approximate Size Chart

| US | UK | EU | Letter | |---|---|---|---| | 0-2 | 4-6 | 30-32 | XS | | 4-6 | 8-10 | 34-36 | S | | 8-10 | 12-14 | 38-40 | M | | 12-14 | 16-18 | 42-44 | L | | 16-18 | 20-22 | 46-48 | XL |

Important Note

Sizes vary significantly between brands and are not standardized. Always check the specific brand size chart. These conversions are general guidelines only.

Worked Example

Convert US size 8 to UK and EU.

us_size = 8
  1. 01UK size = 8 + 4 = 12
  2. 02EU size = 8 + 30 = 38
  3. 03Letter size: Medium (M)

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