An independent size reference

SizeAtlas is built for shoppers, travelers and anyone who's ever guessed wrong on a size online. We publish conversion charts and brand-specific fit notes drawn from official manufacturer guides and international standards.

We don't sell clothing. We don't take affiliate commissions for sending you to a particular retailer. Our only revenue is from a small number of carefully placed advertisements that never block the converter or interrupt your reading.

How we keep data accurate

Every brand guide is reviewed quarterly against the brand's currently published size chart. Country conversions follow ISO 9407 (shoes) and EN 13402 (clothing) where applicable. When charts disagree, we publish the conservative number and note the discrepancy.

Accuracy disclaimer

Conversions are approximate. Fit varies by silhouette, material and personal preference. Always check the specific brand and product chart before purchase, particularly for performance shoes and tailored clothing.