Cindy, i did mine, by myself. i believe they come in a finished size of 2' x 6'. the big hardware shops will cut them for you, if you need bigger or smaller.
i also bought soft wood,1/2" x 1/2"..and glued it all the way around the peg board. you can cut that also at lowes or home depot..you can cut it yourself..they have a table and a handsaw set up for just that..i tried to take a few pictures of the back of mine..but it was hard..can't take it down..let me post the pictures in a minute.