Just to add (or ammend) what Peter wrote. You can also have white (Ivorite) from the shop...and the green Peter shows has been unavailable for a couple of years now. It was green "canvas". All the green available from the shop nowadays is green "linen".
Model #5-5" would be my choice. The 6 incher gets a bit long for me. Other folks feel the opposite, but for "your application" I think 5 inch is a good recommendation. Thumb notches are standard. Micarta and PBH will use up "2" options. The other "3" will be up to you and your needs. It would be a fine knife with just those "2"!
Good luck with it, Capt. Chris

PS: Here's the green linen as an example...CCS