I measured my cross chains at 16 inches and the long chains at 35 inches. I went down to the local wallyworld and bought a set of light truck chains of the correct width. I used a set of bolt cutters and made the length correct. I got a real durable set of chains for about $60 that fit right.
I put them on and ran up the street and back to ruff up the smooth finish, that would have a better gripping on ice. Remember to stop and double check correct fit and tightness after a hundred yards or so.