Lock add-to-cart & auto-adjust customer sizes based on your store inventory. FitMatch is a clean size chart alternative built to reduce clothing returns.

• Size matching – Customers enter their usual size, widget picks the correct size.
• Merchant fit adjustments – Mark products as runs small/big; widget adjusts size.
• Lock add‑to‑cart – Force sizing interaction to reduce “guessed” returns.
• Global defaults + overrides – Set store‑wide rules and fine‑tune per product.
• Theme support – Works with selects, swatches, radio buttons – any theme.