There is no need to stub the cigarette out, the bag does it for you, with PVC fireproof lining you just pop your finished cigarette into the Pocket Ashtray and clip it shut, the cigarette then extinguishes itself and is ready to be emptied into a bin when convenient. Being a considerate smoker, have you ever been troubled by the odour of pocket when you can't find a place to dispose of cigarette butt but to stuff it in pocket? These little pouches were the perfect solution by keeping everything contained, including the smell. 3 5/32" L x 3 5/32" W