Step 1: Remove pre-existing seat and measure stool
Use scissors to remove the pre-existing seat on your stool. Cut off any wicker, remove any wood, upholstery, etc. Now it's time to do some math. Don’t be scared, it’s very simple! Use the measuring tape to measure the length and width of your stool. Write these numbers down; they will tell you how many straps you need to cut for each direction. For example, if your stool is 14 in. x 16 in. / 35 cm. x 40 cm., you will need 14 straps that run lengthwise and 16 straps that run width-wise. Tip: If your leather is 1 in. wide, use inches for this project – it will simplify the process of working with the inch-wide straps.
Step 2: Add 4 in. / 10 cm. to length and width measurements
The second measurement you need to figure out is how long to cut the straps. To do this, add 4 in. / 10 cm. to the length and width measurements. Taking the previous example, your vertical straps would be 18 in. / 45 cm. and your horizontal straps 20 in. / 50 cm. This will leave enough room for your to wrap your straps around your stool and attach.
Step 3: Cut leather straps
Now it’s time to cut. Grab your ruler, pencil, and leather straps. First, we’re going to cut the vertical pieces of leather. Flip your leather over, so that you’re looking at the underside, and measure the length needed using your pencil to mark the distance (going with the previous example, this would be 18 in. / 45 cm.). Measure out the number of straps needed for the vertical side using what you found in step one (in our example, this was 14 in. / 40 cm.). Follow the same steps for your horizontal straps.
Step 4: Mark where screws will go
Prep the strap to make holes for the Chicago screws. First take the end of one strap and loop it around the outside frame of the stool.
Layer the bottom end of the strap, so that there is about 1 in. / 2 cm. of overlap with the top layer. Using your pencil, mark a dot in the center of the overlapping section, and trace a line on the underside where the strap ends.
Step 5: Punch holes in leather
Remove the strap from the stool and grab your leather hole punch. Punch a hole in the strap where you made a dot with your pencil. Fold the bottom end back under, so that it lines up with the pencil line. Take the leather hole punch and make a hole in the bottom strap, making sure that it lines up with the top hole. Repeat step 5 and this step to make holes in one end of all vertical and horizontal straps.
Step 6: Attach vertical straps
To attach the vertical straps, loop the end of each strap around the stool frame. Insert the post end of a Chicago screw, so that it goes from the top two holes, and then screw in the back using a flat-head screwdriver. Repeat this step with each vertical strap until they are all attached along one side.
Step 7: Attach straps to opposite side
Loop the straps around the opposite side of the stool frame and pull the the leather taught. Grab your hole punch, and punch holes in the top and bottom of each strap end, making sure that each hole lines up. Depending on how strong your hole punch is and how thick your leather is, you may be able to punch through both layers at the same time. Using the same technique outlined in step 6, insert the Chicago screws and tighten, so the vertical straps are completely secured to the stool.
Step 8: Attach one end of horizontal straps
Now, attach one end of the horizontal straps to the stool using the process outlined in steps 5 and 6.
Step 9: Weave and secure opposite ends
Weave the ends through the vertical straps, going over under. Secure the opposite ends of your horizontal straps using the same process outlined in step 7. Done!