Two pairs with the same style code can trade hundreds of dollars apart if the sizes differ. That is not noise — it is the market. Sneaker resale prices size-specific demand the same way card prices grade-specific demand.
Why size moves the number
- +Supply is uneven across the size run — extreme sizes often have fewer pairs.
- +Demand clusters around popular men's sizes (often US 9–11) for absolute dollars.
- +Rare sizes can clear at higher multiples of retail even when volume is lower.
- +A blended chart averages those markets into one misleading headline.
How to track the market you wear
Open a GrailHawk style-code guide, set a size-specific alert, and store US size on portfolio holdings. Match listing titles that look like your size (US 10, Size 10, 10M) instead of watching a StockX screenshot for "the shoe."
Style code first
Size matching on the wrong colorway is still the wrong shoe. Confirm the SKU (e.g. DD1391-100) before you trust a size-matched ask.