The S-A1 is their compact its slightly smaller than the Glock 19 but not nearly as small as the Baby Glocks(26/27).id say Ruger SR9c size maybe.
The M-A1 is the one thats around Glock 19 size Steyr Mannlicher US:*Steyr Pistol M-A1 The L-A1 is the newest its their full size duty type pistol Steyr Mannlicher US:*New! Steyr Pistol L-A1