10-Bottle Essential Oil Carrying Case is designed to hold 5ml (1/6 oz), 10ml (1/3 oz), or 15ml (1/2 oz) round bottles, up to 1 3/16" diameter. Will also hold 10ml (1/3 oz ) essential oil roll-on bottles up to 3 3/8" tall. This versatile travel case measures just 8" wide x 5" tall x 2" deep.