If you're considering using it for SD where deployment and a secure grip are important, then you should also add the ergos and grip security to your list of requirements. I use small FBs for EDC carry a lot, but I don't do any SD training or work with them and I've never been trained to consider it. Point is, a lot of small FBs will work for me where it doesn't matter how quickly I can draw it and even not so much how secure my grip is in stressful situations. I have several small FBs with smooth micarta or stag handles that cut well but would be very questionable in SD because they're smooth and slick and the sheaths don't allow for the kind of carry that gives quick access.
The ones I know about that might work for you are the ESSEE Izula, the Dozier Personal from A G Russell, Becker's BK14 ( the BK11 handle was too short for my hand), or something from a custom maker here on BF. There are many others out there, but those are the ones I've had some experience with.
"If there are no dogs in Heaven, then when I die I want to go where they went." - Will Rogers 1879-1935