This economical plastic finger gauge is so practical. Each ring size is accurately made in the USA and removable so that prospective customers can take them for easy reference. Each ring is clearly marked in half sizes from 2-1/2 to 14. Made of light blue plastic the entire unit measures 4-1/2 x 7-1/2 x 1/8. Easy to use store and helps make the sale! Sold by the dozen.