It's 6.25 inches long, 5.25 inches high and barely an inch thick.
Bernardelli used to make a tiny .25 auto. You would hardly know it was there. Also a Baby Browning .25 auto.
Before all the usual suspects start laughing, I carried a 1911 for many years. After that a Browning Hi-Power. Both n a shoulder holster. If either of them were too uncomfortable, I would certainly rather have a .25 than nothing.