I use cherry strips for the ribs, and they are tiny!  They're 1/16" wide x 1/32" thick.  To make them bend easier, and to conform to the interior shape of the canoe, I soak them a couple at a time in a solution of 50% water and 50% ammonia.  The ammonia helps the water evaporate quickly, and the super-glue will stick, even if they are still a little moist.  I use a fork to keep them submerged for about 10 minutes.