No. 6 - 7 cm
No. 7 - 8 cm
No. 8 - 8.5 cm
I opted for the No. 8 as it closely matches my Mundial which I really like.
The are also offered in a variety of handles from Beech (cheapest) to Oak and Olive and even exotics. I opted for Olive as it had a cool look.
I am not tough on knives so I am not going to go through extremes of waterproofing or weatherproofing the handle.
I opted for Stainless rather than Carbon steel for corrosion resistance.
The knife was a very reasonable $24, so I added a stone ($9) and a 4" serrated Paring knife ($9) to get free shipping.
The goal is to have something to take on trips when we are traveling by car or checking a bag. I like to be able to cut fruit and have my "own" knife when on the road. It would be very suitable for camping and picnicking. I intend to leave it locked open and get a feel for using it at home.