Yeah, those Uncle Mikes thingys are pretty good for the price. Size 15 is the one for the G29. I bought one because I'm cheap and a single holster allows me to carry the 26 or 29 just fine (although the 29 fits a little better), so it was kind of like two holsters for 1/4 the price of one. I've been wearing the 29 in mine for 13 hours today, its perfectly comfortable.
One caution about this holster though. It doesn't retain the pistol very well. If you're an active sort, you will notice some shortcomings. When I run, the 29 feels like it's about to bounce out of the holster, although it never has. If you crawl around on the ground on occasion (or fall), like I do, for no apparent reason, the pistol may fall out of this holster. This actually did happen to me. I don't recall why, exactly, I was horizontal, but I was carrying either the 26 or the 29, and the pistol dropped out of this holster onto the ground. Don't try to go on any carnival rides with this rig.