Why not just come out with a one single size Sim card so when I person orders one they can pop out what ever size is needed for there phone. This will bring your cost down.
^Sure there is. Wind Mobile as a matter of fact only has one size fit Sims. They don't carry any other types. However Rogers and Fido have them too but they also have individual ones as well
^The Winds website doesn't show it, before April 2013 they had dual micro/regular format in one sim and also carried separte micro and mini(regularSims). because iPhone 5 was the only phone that took nano Sims which they didn't sell and any iPhone before that was compatible on there network but ever since after April 2013 iPhone 5 and up became compatible with there network they now have 3 in one sim cards, so you pop out whatever size you need.
Edit: Reposting to fix some typos because I couldn't figure out how to edit the post on my Phone's Chrome Browser The Winds website doesn't show it, before April 2013 they had dual micro/regular format in one sim and also carried separte micro and mini(regularSims). because iPhone 5 was the only phone that took nano Sims which they didn't sell and any iPhone before that wasn't compatible on there network but ever since after April 2013 iPhone 5 and up became compatible with there network they now have 3 in one sim cards, so you pop out whatever size you need.
Yesterday I was at Best Buy, I noticed that they sell SIM adaptors that U can use for any SIM, I was not sure if it can hold the 3 SIM size or only 2 types of SIMs, I didn't have time to ask Best buy PPL.
The 3 in 1 is a great idea. I have personally used the sim adapters and while yes they do work, you have to be careful that the sim doesn't shift when sliding it into the sim slot of your phone or else you risk damaging the delicate pins that make contact with the SIM card. I have had this happen to me and was lucky enough to be able to bend the pins back in place. The damage usually occurs when pulling the adapter back out after the SIM card falls away from the adapter.