Is the number of bits used in a Binary field variable or is it some fixed, very large value? I’m thinking of using a byte as the only value stored in a Binary field. So is binary the type to use?

Oh, the Binary Data help page (from the Index) states:

## Bytes

A byte is a collection of 8 bits. There are 256 possible combinations of 1’s and 0’s within a byte (2 multiplied by itself 8 times, i.e 2*2*2*2*2*2*2*2=256). These 256 combinations could represent characters, they could represent numbers from 0 to 256 or anything else.

I assume for unsigned values, the range is 0-255.