Step 1: What You'll Need
Step 2: Prepare
Cut 4 strands of hemp about 6 times the length you want your belt to be. It's always better to get more than you need. Cut the belt off of the buckle. Then attach a strand to the buckle by folding it in half. Put the loop under the buckle and pull the ends through. Repeat with another strand.
Step 3: Knot!
Disclaimer : I did not go over how to do a square knot in this Instructable.
Step 4: Finishing
When you're ready to finish the belt. Make a big square knot using all of the strands you have. Use the 4 middle strands as your middle piece and two strands on each side to tie the knots.
Whenever you want to stop, tie a knot (jump a normal one =P) then cut the excess off.
Tada! Totally wearable hemp belt!