Thing No 31234 is a great design but couldnt fit it on my reprap prusa 2.
Cut it down to a nice square sheet.
Im guessin you could print a lot of them and make a tshirt?
should fit easy on a normal Prusa I2 heated bed.
tip: if using PLA use water down PVA glue instead of kapton/PET tape. It will stick better and also when print is gone let the glass cool down then get some soapy water on that glass. Print will come away much much easier