Each brand has its own sizes! It's very important you check the size before you place an order. elvetik rubber boots size chart - Find a hard surface floor that butts up against a wall to measure your foot. Grab a tape measure or a ruler that is longer than your foot. Remove Your Socks. Stand with your right heel against the wall and mark where your longest toe comes out to. Stand with your left heel against the wall and repeat the procedure. Take the measurement of the longest toe on the longest foot. You’ll need to record the number in inches and in fractions of an inch. Then choose your US size from the ELVETIK size chart.