Bar Clamp. Must be this type
, not this
Plank of Wood
Vernier/Dial Caliper. Must come with a depth rod like this
Ensure the depth rod on the caliper is as far down as it can go. Tape the top of the caliper to the bottom of the plank.
Clamp the plank of wood to the table, so that the depth rod touches the floor. Place a heavy book on the bar clamp to secure it. Now read the measurements on the caliper.
- Place the shoe underneath the rod. Then move the rod down, until it touches the insole of the shoe. Re-measure the caliper.