This is a reproduction helmet liner leather in a size 53 (for size 60 helmet shell) for liners that fit the regular German WW2 combat helmet, models M35, M40 and M42. It is made from a reworked Czech helmet liner. You need to know exactly what size liner leather you need since each liner leather is for a specific liner size. To install the liner you will have to stretch the leather first and then stretch the leather over the inner liner band. This is better to do when the inner band is not in the liner. If you have to you may need to stretch the leather as you put in each rivet, just install the rivets from opposing sides each time you put in another rivet. It is only $3.50 to ship this item anywhere in the US and most places outside Europe, within the EU it is only $2.50 for postage.