Do you actually know what size Snow Blok chains people need?
My tyre size is: 185/70 R14 This is a completely standard tyre size and I feel you should be able to tell me which chains I need. 50, 60, 70, 80 and 90 are not sizes anyone would recognise without experience. The whole point of the internet is, in this case, so you don't have to visit the store. I would drive up but it's too snowy.