use your thumb and forefinger to measure the bars then walk to the bike shop really slowly with your hand still.
HAH! :D
Seriously though it should say some measurements on the stem itself, or inside the faceplate, etc...
@pifko started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
HAH! :D
Seriously though it should say some measurements on the stem itself, or inside the faceplate, etc...