Ive all ways owned mine, currently I have a multifit ladder type that can be adjusted via extra links for a variety of sizes (10r15 to 235/85/16).
Most of the makers now seem to be going to diamond pattern, which are great for icy & snowy bitumen roads. If you just want them for snow, then Id go for the diamond pattern. If you want a combination chain (mud/snow/gravel) then I still think the old ladder pattern are the way to go.
Diamond chains are pretty size specific and non adjustable via extra links.
With the larger size you are after there may be a limited range anyway - you mitnt have many options.