I used MDF that already came cut 11 1/4 inches wide. If you want your lockers to be deeper and wider than mine, you could buy the large sheets of MDF at Lowes or Home Depot and have them cut it for you to the width you would like. For example, 15 in. wide to give you deeper lockers. Out of one sheet, you could probably get 3 strips cut at 15 in. wide. :)
I first cut my back brace 12 in. wide and placed it at the top where I wanted the top of the lockers to start. (80 inches).
I next took my finished side panel and placed it up against the outside end of the back brace forming an "L". I then screwed in a screw to anchor the side panel from the outside of the end panel into the end of the back brace board to secure it along with some finish nails.
My lockers are 80 in. tall and 63 1/4 in. wide. I cut, filled nail holes, sanded, primed, and painted each of the side panels before I assembled them due to the narrowness of each locker. I attached the hooks also before I assembled them because I knew my drill would not fit in the lockers after.
Here are the measurements of the inside of each of our lockers...
Remember the doors sit inside the lockers, so the shelf supports are not as wide as the width of the sides of the locker so there is room for the door to open and close.
The shelf support at the top measures down 14 in. from the top of the board. The square board that sits on top of the shelf supports measures 11 3/4 in. by 10 in.
Here are some more measurements of where the other shelf supports start. *Note, I only built the 3 shelves down low on my littlest girl's locker because her coats are not as long as the other kids. If you are building lockers for bigger kids, I would recommend only having 2 shoe shelves.
I purchased my Hinges at Home Depot along with my handles also. I hope these dimensions will help you in your quest to build your own set of lockers! Good Luck!
***If you would like to see more in depth of how I built our lockers, you can see that here or by clicking on the photo below.
With Much Love & Gratitude,