Handy stopper/tubing sizer easily determines the correct size of the cork or stopper needed for any flask, bottle, etc.

Insert the thin triangular gauge into the vessel and the correct stopper size is read at the top of the neck. Two scales are provided: one for rubber and vinyl stoppers and the other for corks. The back side is a circular scale to size tubing outside diameters between 4 and 52 mm.