I am working on a Router Table so I buy some 3/4" X 4' X 8' Birch Plywood for the project. Now I don't check the thickness cause like a fool I think its 3/4" cause that is what Lowe's said it was. Well I get a bunch of the pieces cut out and start doing the dado work and set the dado at 3/4" and run my pieces. I got a scrap piece of MDF 3/4" check the dado's and we are cool. Then a little later I check the shelf that is going in the groove and it is like almost 1/8" to big. I check the Birch Plywood and find it is not really 3/4" but closer to 11/16". My dump mistake for not checking I know but was I that wrong in assuming that when I bought 3/4" plywood that I was getting 3/4" or does all birch plywood measure less then what it says at Lowe's. I bought a sheet of 1/2" X 4' X 8' at a Hardwood Supplier and it measured the 1/2" that it stated it was. I had to go and get more and remake the sides and then adjust my measurements for the smaller dimensions. It is going to work out just fine now that I know but really bugged me when I first found it. I guess next time it will be the Hardwood Supplier for me. Norm's Table sure has a lot of parts.