11.8cm/4.65" in diameter, which suitable for most types of mugs,cups and glasses | Creative new diamond design for this silicone drink cup Lids,temperature range:-40ºC~230ºC (-104~446 F),safe in microwave and refrigerator | Will get 6 different color cup caps,one person one color so can easily distinguish their own cup.Perfect use at home,office,hotel,camping | This silicone mug cover is made of Food-grade silicone,non-toxic and without any strong chemical smells. | Seals tight on all smooth rims like cups,mugs and glasses,prevent from dust,airtight and leak proof,keep your drinks hot or cold