This portable medicine box is made of high-quality plastic. It's beautiful and compact enough to fit into clothing pockets. It has a separate six-compartment design and a removable bulkhead that allows it to expand its capacity. The opening contains silicone seal, so that it has better sealing, can be moisture-proof and avoid light so that it can better and longer maintain efficacy. 2 2/5"W x 3 3/4"H.