Buy 6 long sticks from (Common: 2-in x 4-in x 8-ft; Actual: 1.5-in x 3.5-in x 8-ft) Stud for 3 dollars each.

Cut 2 of them in half to get 4 long sticks of aprox 120cm

Cut 16 small sticks of 30.5cm

Step 1: Labeling and Building

We need to build 2 different "ladders":

For the first "ladder" one we need to mark the 2 long sticks with separation of 20cm and put a nail on the mark.

For the second "ladder" we need to mark the 2 long sticks with separation of 15cm and put a nail on the mark.

Put the short stick vertical and the long one on the top to be able to push the nail through the middle of the short stick. Dont push the nail all the way because we want later to rotate a little bit the short sticks to have them in a diagonal.

Step 2:

We should have the 2 ladders already and they should look like in the pictures

Step 3: 2 Ladders Together

now we need to ensemble both "ladders" using 4 more short sticks

we need to nail the 4 short sticks to balance the rack, so I put 2 on the bottom and 2 on the top to make stable and strong.

Then rotate a little bit the steps of the "ledders" in order to give them a small slope to hold the shoes diagonally. The "ladders" with the sticks separated 20cm is the front of the rack and the one with 15cm separation is the back, so the front of the shoes will be lower than the back. please look at the last picture to have a better idea of what I mean with the small rotation and how the shoe should lay on the rack.