What size is the FormBox? Elisa March 22, 2018 15:41 Updated Follow The dimensions of the FormBox are: Length - 467mm Width - 273mm Height - 314mm Related articles What is the size of the forming bed? Setting up your FormBox for your first Form How long can I use the FormBox for in one session? So, what's in the box? Comments 0 comments Article is closed for comments.