[Inkscape-user] Create the same size square box every time

Right now to creating a box with the F4 key or "Create Rectangles or squares" pick and sizing the box to the size I need, to create a box at the size I need already.

We only use Inkscape to create a 1/8 square box....That is it, nothing more. But we need this box to come in at the same size every single time. If I could have a presized box already made and just pick "Create box" and know it would always come in the right size that would be great.

Any ideas?