6 1/2" x 5 7/8" - 1.15 mil thick (40 per Box) These bags are great for storing medication, making ice packs or keeping snacks handy in any school setting. These bags have an easy close red and blue track ColorLoc zipper. You will be able to see and feel the zipper close. Ziploc bags come with pleated expanding bottom. These bags are great for several different needs of the school or clinic.