Size Oracle — Universal Size Advisor

Privacy-first size advisor for 100+ stores. Enter measurements once, get accurate sizes everywhere.

Stop guessing your size when shopping online. Size Oracle recommends your perfect clothing and shoe size on 100+ popular stores — from Nike and Zara to Amazon and Gucci. 🔒 PRIVACY FIRST All your measurements are stored locally on your device. Nothing is ever sent to any server. Zero tracking. Zero data collection. 🛍️ 100+ SUPPORTED STORES Works automatically on Nike, Adidas, Zara, H&M, ASOS, Amazon, Nordstrom, Levi's, Gucci, Uniqlo, Lululemon, and 90+ more retailers. 🎯 SMART SIZE SCORING • Brand-specific size adjustments (Nike runs small, H&M runs large, etc.) • Choose your fit preference: Fitted, Regular, or Relaxed • Supports Men's and Women's sizing • Multiple measurement profiles (for partners, kids, etc.) • Inches and CM support HOW IT WORKS 1. Click the extension icon and enter your measurements 2. Save your profile 3. Browse any supported store — your recommended size appears automatically Built by Varun Meda — making online shopping stress-free, one size at a time.