I forgot to add the holes are 3/8” . You can make this out of what ever you want as big or small as you like; I was going to make it out of small plastic cutting boards (that stuff lasts forever) you can also put longer pegs in the holes to hold trays, big mugs ect... I have short L-brackets on the new one I made, I'm thinking of adding longer one's to stabilizes it a little better but it's not bad the way it is.