Measurements are spot on. I assumed they would be off so even though I measured 42 inches I went with the L/XL (43-44) and it's a little big. The first time I put it on I fell in love with it. I need it tomorrow so I don't have time to return it and I want to keep it anyway just in case I gain some weight. Now that I know the sizing is spot on and how great it feels to wear I'm looking forward to ordering a Stowaway for the extra pockets.