Bath bars are 3.5Tx2.75w and however thick you want them cut. Lenght-6" ea side compartments
hand size are 3.5Tx2.25w and same as above.
length is 8" ea side compartments
Does that make sense?
I do construction for a living, and those were made from stuff they threw away!
I just used what I had on hand-scraps! The saw was made by my DH-he's a machinest.