I have a P238HD and a P290rs. On paper their dimensions are listed as very similar. However, side by side the P290 while small is significantly bigger in all dimensions save length than the 238. It appears Sig includes the sights in the listed height of the P238 but omits the sights in the published height of the 290. On small guns, a small difference can loom large. The 290 is actually about 7/8 inch wide through the grip and the slide. The slide release gives an overall width of about 1 inch. If the 365 is actually slightly over one inch wide through the grip which I suspect it must be to hold 10 rounds, it is significantly thicker than the 290 and, I gather, the 938. I am quite anxious to see one in person but I don’t expect it to be as tiny as first reports are hinting. It still sound quite interesting.