Just make the flat back piece first whatever size you want it, then make the top horizontal piece just a couple inches longer than the width of the back piece that you already made, so it sticks out just a little. The 2 upright pieces on the sides will just be the same length as the back piece (minus the width of the board at the top) since they will be put right under the top board. It looks like it might've been cut at a 45° at the bottom where they are angled down towards the back piece, but it doesnt have to be a 45° angle, just whatever looks the best to you will suffice. Then measure between those two upright side boards to get the measurement for the second horizontal board (the bottom board for the cubby holes).. Lastly, you just measure the distance between the top and bottom horizontal boards and cut the cubby hole divider pieces at that measurement. After gluing and nailing or screwing it all together and adding the coat hooks then you're done unless you want to put a stain or finish on it. Really no need for plans for something like this if you have basic skills and a tape measure haha hope that helps!

You can either use a cleat that is put onto the wall and then the rack is fitted to it. You can do screw holes in the rack that somebody can put the screw through the front into the wall.

I hope you've mov2d forward WITH your plans my friend I hope currently gettinv a little workstation together! Been wanting to do wood work for YEARS!! FINALLY FINALLY I have decided to chuck everything in.. I'm poor as fuxk.. 5 children.. BUT you don't need money the way they make out you do.. I eat food from the land and I'm on my way to becoming a great woodworker!! WATCH THIS SPACE 😁😁💜

Texas Forever I would also want to know what type of saw you used to cut the legs.

Looks like a "Black & Decker Scorpion" Saw.