User blog comment:Draven, the Glorious Executioner/Seroch, the Mirror Nomad/@comment-7481207-20140418163319/@comment-24564937-20140421031738

I think you want to measure wall-width in units, not pixels, a unit being the distance of measurement used for lengths, ranges, and speeds in LoL. Yasuo's wind-wall width, for example, scales with rank, and is 300/350/400/450/500 units wide. For comparison the average move speed without items is around 350, so at wind wall Rank 2 it would take one second to walk the width of the wall if you were paralleling it.

Hope this helps. This does look like a pretty neat champion concept, btw, and I'd love to try playing it if it were ever made. ;-)