The topwale on my 1911 18' OT IF is 1 3/16"-1 3/8" (?) wide and 1/4" thick. The outwale is 1/4"x7/8". Both have rounded edges, not quite quarter round.
The keel measures a weathered 5/8" and 7/8" on the parallel sides. The depth is 3/4". The measurements on the outside of the fibre-glass would be a little larger.