Its about, 4 inches I would guess? I can measure it exactly this weekend, but My best guess is 4 inches. Its not very large, but it fits the kabuki brush. I bought it for like $15 and ended up buying a complete brush set a day later, and I really need to get rid of things because I am expecting :D So I will have tons of listings for a while
When I bought it online it was listed as so.. so I would hope so... Otherwise I would feel a bit duped. I honestly dont know how to tell the difference, but it says MAC and it matches the Hello Kitty Liquid Eyeliner and Mascara set I bought from the MAC outlet last year.