eBay Size Standardization

To address a new eBay requirement to standardize size values on applicable listings starting mid-July 2026, Lister will begin automatically normalizing size values on the backend, before they reach eBay.

For example, "Small" will be converted to "S" when needed. If a size input can't be matched to a valid eBay value, the listing will need manual review as usual.

Worth noting, eBay data shows standardized sizes convert at roughly twice the rate of non-standard ones (3% vs. 1.5%).

This improvement won't require any workflow changes on your part.