I ordered in feet actually. There is a fabric store across the street from where I work and I just pick through what they have. A meter is 39 3/8". I don't know if it is poly or nylon, likely poly though with how the ends melt when heated to stop the fraying after cutting to length.
Those seats had the 2" black down first, then the darker green on top, the lighter green weaved through. I stapled the darker green on top after the black was stapled in. I tap the staples down with a hammer, seat them I suppose you could say.
I build my own seat frames. I made jigs for putting a contour on the frames and usually do a 5 or 7 ply lamination of cherry and ash and try to get just over an inch of thickness before routing the corners off. All edges are rounded over after I put the frames together with mortise and tenon joints. I actually do the joints by hand since I lack a drill press and the appropriate tooling for the mortises. Brad point bit, chisels, patience, etc. The joints themselves are glued with epoxy with the hopes they won't ever come loose.
In most cases I make my frames, the seating area, larger than usual. I want my butt on the webbing, not on the wood frames, but it cannot always be done that way. With some of the w/c canoes we have up here, the space between the inwales for the factory stern seat is less than 14" so I make that to fit and the bow seat to match. If it is something like fitting out a solo I can make the seating area larger.
Length of webbing, off the top of my head for the last set I did on Red's Tremblay... 25 feet maybe, it would have been more for the green seats since there is more material used. Either way it was less than $20 for each pair. The green ones were firmer with the extra layer than the red and black ones.
As for which is better. I haven't spent enough time in my cane seats for comparison really and the cane ones I also do oversized seat area when I can.
