That depends on your boot length and the board width. Generally you don't want your toe or heel overhanging the edge more than about 25 – 30mm. If you have a US11 (44) or larger boot then you'll need to check this by trying your boot on a board. With this boot size you may need to look for a board with a waist width of 255mm+, or even one of the wide models that are around 260–265mm.
