I bought one and I'm not sure what the dimensions are but the neck is definitely thicker than an Ibanez (I used to have a 7420), but still comfortable. I will tell you, the pups in the WG are much better than the v7/v8s in the lower model RGs. I would recommend the WG over the 7321 or even a 7421 (assuming you're looking for a
fixed bridge). If you find a good deal on a used 7621, go for it. Otherwise, it sounds like you're looking in the sub-$300 range also, go for the Washburn.