This is a 1:1 size (life size) 3D printing model
Be sure to scale it to the right size. Everything about this model is visible in the photo. It is recommended to use 3D Builder to scale and split the model. When printing this Helmet set orientation, splitting, and slicing is up to you. Please, Do not share/resale the 3d model, for private use only
https://www.microsoft.com/zh-tw/p/3d-builder/9wzdncrfj3t6?activetab=pivot:overviewtab