A:AnswerThis SIM card will compatible with Galaxy S10.
However, if your phone is not unlocked, then this sim card won't work.
Please make sure your Galaxy S10 is unlocked or same carrier as Verizon.
A:AnswerSim cards come in 3 sizes that are included in one card, just punch around the perforations for the size you need. The package will state for which phones they will work. You can also Google what size sim card do I use for my phone.