The width of the goggles I normally wear,...
The width of the goggles I normally wear, from left to right(not including straps) is 7 inches across. the goggle is a Smith Knowledge. is this Dx right for me?
The approximate dimensions of the DX goggle is 7" x 2" x 3".
I'm not sure if you if have the Smith Knowledge OTG or an older version of the Knowledge that wasn't an OTG (over the glasses) model but the current Knowledge goggle is a larger frame than the DX goggle. The Knowledge OTG is designed for large faces whereas the DX is for medium faces.