A: I didn't measure it but I'd say it was an inch. I think there is just one standard size.
|Brand||JONES STEPHENS||JONES STEPHENS||JONES STEPHENS|
|Name||1/2 in. x 30 in. Water Meter Key with Box Lid Key||36 in. Solid Steel Water Meter Valve Key with Grips||5/8 in. x 60 in. Length Steel Street and Curb Water Meter Key||3/4 in. x 36 in. Length Steel Street and Curb Water Meter Key|
|View Product||View Product||View Product||View Product|