Model Size 4-1/4” dia. x 5” Card Size 6-1/2” x 5-1/4” Base Size 6-1/2” x 5” Enlarged cylindrical cross-section of skin with relief detail displaying three conditions: acne pustule (pimple), closed comedo (whitehead), and open comedo (blackhead) on backside. Also shown is a normal section of skin with the epidermis, dermis and subcutaneous tissue, including the hair follicle.