I wouldn't mind trying a pair of Viberg's however at $800 and on the blind without being able to try on a pair to determine my size - no thanks.
I see that Viberg has been stocking items on their website and offer a return policy for full refund. It could be a good way to determine size however it appears that most of the styles are very broken with few sizes remaining. Will they be restocking?
The 3sixteen makeup looks great however - same problem. A $1000 boot - and no returns. How can anyone pull the trigger without knowing exactly what size they will be.
Most of us know what size we are in other similarly shaped/sized lasts, so it's not that difficult to do. If you have a question about what size to get, you could always just post here or e-mail viberg and somebody can help you figure that out.