Smartphone / Tablet support

Hi guys,   I wanted to create this smartphone stand with a clean, stylized design that's also comfortable and practical. Naturally, in addition to being able to position your smartphone on your desk both horizontally and vertically, it can be attached to a wide variety of supports, such as kitchen accessories, chairs, playpens, cribs, kitchen cabinets, or any other surface you like. To this end, I created four attachment sizes: Small 10 mm, Medium 15 mm, Large 20 mm, and Extra Large 25 mm, depending on the width of the support you want to attach it to. Additionally, the rear compartment can be used to store post-it notes, earphones, cables, etc. Naturally, if you want to use it for a tablet, simply change the size to your liking, and you'll have the same use for your tablet. Personally, the original size worked well for my desk. There is a need to add both internal and external brim, in order to ensure perfect adhesion to the print bed.