WHERETOGETPAPERPLANES.COM
125th Street has been Harlem's commercial spine for a century.
This is not an oversight. Paper Planes sells wholesale to small neighbourhood retailers rather than to chains, and in Manhattan those shops are uptown.
Capsule is on West 125th itself.
Staff who know the product. That is the short version.
The Original Crown, the founding 9Fifty, one size, nothing to measure. The safest ask in either shop. Fitted caps if you know your size, and call ahead with it.
Every shop, address and detail is in the full guide, and the store map covers 21 states.