KING LODE: 100 Piece Glass Vials In Size 2-3/8 inch x .55 inch with black caps Bottles Are Clear Glass, With Black Plastic Screw-on Caps They are 2-3/8 nches in height and about 1/2 inch in diameter They are an excellent way to display gem stones or other small items Great for use in the science lab for samples or specimins-these vials come in a set of 100 pieces Can be used in the classroom for instruction in entomology, and collecting specimens in the field