Made up of three layers, the epidermis, dermis, and hypodermis, skin's thickness varies from 0.5 millimeters at its thinnest and up to four millimeters at its thickest.

表皮层，真皮层和皮下组织。皮肤最薄处为0.5mm，最厚处为4mm。

Made up of three layers, the epidermis, dermis, and hypodermis, skin’s thickness varies from 0.5 millimeters at its thinnest and up to four millimeters at its thickest.

皮肤由表皮、真皮和皮下组织三层组成，厚度从最薄的 0.5 毫米到最厚的 4 毫米不等。