1-7/8 x 1-1/8 inch. Tough under fire. TSA-accepted. Set your own combination. Flexible shackle protects zipper. Travel Sentry approved. Lock your checked baggage with the lock TSA screeners won't cut! Transportation Security Administration (TSA) screeners can open, inspect and relock bags locked with a TSA-Accepted lock. Combination resetting instructions enclosed. ComboLocker.com by Master Lock: Store your combination or key number at www.combolocker.com. Made to exclusive Master Lock specifications in Taiwan R.O.C.