7" is kind of a tricky size- lots of makers scale down their larger knives and they end up with fairly thin and light knives, hard for me to hold onto. And for utility use I want a blade that is fairly thick. I've always thought that 7" or slightly less is something I could carry in my jeans pocket. I've seen some of the TOPS knives that were interesting to me- the UTE, CAT, Lil Bor and Blue Otter for instance. If I had the cash there are plenty of BRKT models that look really interesting.
If a person is not going to carry the knife in a pants pocket then I would suggest going a little bit bigger than 7" OAL, the reason being to get a handle that is big enough to hold onto.