My Little Pony Retro Neon 100 Deckbox - Rules of Play says:

Store and protect your favorite deck with this My Little Pony Retro PRO-100 Deck Box, sized to fit 100 standard size (2.5" x 3.5") gaming cards double sleeved in Ultra PRO Deck Protector sleeves. Each box features detailed, full color artwork. This box is light, easy-to-carry and made with archival-safe, rigid polypropylene material. The self-locking lid design makes it easy to secure your deck, while thumb notch sections provide easy access to cards. Each box comes with one (1) deck divider with full color artwork.