Not as detailed & neat as the Midi EWT post above, but here's the profile dimensions on my Mini EWT Rougher and also on my larger Bowl Pro tool.
The photo perspective on the EWT tool is a little off - the 26mm dimension is just behind the ferrule, the 35mm dimension is at the fattest part of the handle, the next 26mm dimension is between the first two burn marks and the 30mm dimension is the fat part at the end just before tapering off. The 8.5" length is from the end of the ferrule to the end of the handle. Not shown is the bar length which is 4" (includes the ferrule length).
The Bowl Pro is a larger tool, similar to the full size EWT tools. I didn't include the dimensions on photo, but the fattest part near the ferrule is 36mm, the narrowest diameter is 25mm, then it simply tapers up to 40mm for the largest diameter at the end before tapering off. Overall handle length (excluding ferrule) is 16.5" and the bar (including ferrule) is 8".