I designed this to hold standard size diabetic insulin pens vertically for easy access and less wasted space. It has been tested with Fiasp, Tresiba, and Humalog pre-loaded pens.

The rough dimensions are 222mm wide x 130mm deep x 60mm high. There are 43 pen slots in total. Each pen slot is about 57mm deep which is enough to hold the pens steady but still show enough of the label to identify which type is which.