Maternity Clothing Size Conversion Guide
Convert maternity clothing sizes across US, UK and EU labels with trimester fit tips for bust, belly, hips, bras and comfortable online shopping.
Maternity sizing is designed around your usual size plus pregnancy-specific room, but international labels still vary. A US maternity medium may not equal a UK or EU medium in every brand. Use the Clothing Size Converter as a regional starting point, then compare current body measurements.
Start With Pre-Pregnancy Size
Your pre-pregnancy size is often the first reference because maternity cuts add belly room. If your bust, hips or arms have changed significantly, current measurements are more useful. For fitted dresses or pants, check both the regular size conversion and the brand's maternity-specific chart.
Measure Bust and Bra Size Again
Bust and band measurements can change quickly. Use the Bra Size Converter when buying maternity or nursing bras internationally. Adjustable bands, stretchy cups and soft fabrics are helpful, but the starting size still needs accurate underbust and bust measurements.
Consider Trimester and Fabric
A garment that fits in the second trimester may feel tight later if the fabric has little stretch. Knit dresses, leggings and wrap styles usually adapt better than structured trousers or woven shirts. If shopping ahead, choose pieces with adjustable waistbands, stretch panels or relaxed cuts.