15 discs fit in my bag well, and that's what I always carry, it makes it easy to check they are all there (6 in each half of the main compartment and 3 putters. ) probably about 8 to 10 discs are what I use, the rest are spares or discs I'm working in or trying out. I also carry 2 of my regular putter, not including the driving putter. I can play my local course with about 3 or 4 discs. I played some new courses over the weekend and used about 8.