These will fit 10x12 plates.
It actually states that it holds 10x12 and 11x14.
Update: I own and run with a Testudo vest. I personally run with the 11”x14” size of plates, Level III+ light weight multi-curved advanced “swimmers” cut steel and it is comfortable and effective. This vest fits both 10”x12” and 11”x14” sizes of plates and all the variety of features of those plates. My rig fits like a glove, has a generous adjustable hook & loop system, it is stable in all orientations in which I find myself, easy donning and doffing. I use the side plates too at times. Good value, high-quality,
I own and run with a Testudo vest. This vest fits both 10”x12” and 11”x14” sizes of plates and all the variety of features of those plates. I personally run with the Level III+ light weight multi-curved advanced “swimmers” cut steel and it is comfortable and effective. My rig fits like a glove, has a generous adjustable hook & loop system, it is stable in all orientations in which I find myself, easy donning and doffing. I use the side plates too at times. Optics Planet and AR500 are each goto sites for me for years now. Two-thumbs up.
the testudo will accept both size plates. the Testudo is meant for larger frame bodies but will still fit Med to XXL. I believe one major difference is the real estate room you have. hope that helps