He's 11"; his body or, "suit" is made out of black minky, his head and hooves are made out of white minky. (he's so soft an loveable!)
His collar is made out of white glacier fleece and sewn into him, his tie is made of ruby quilting cotton and sewn on.
He is handsewn together with thick embroidery floss (to make him sturdy!), filled with high quality Poly-Fill and has Poly-Beads in his hooves so he can stand on his own.
His tentacle belt is made of pilled fleece, and is buttoned on. The tentacles are the same material, but have some pipe cleaners in them so they bend around.
His iconic pages are white quilting cotton, with hand drawn details.

My Little Pony © Hasbro
Slenderman © Victor Surge or Eric Knudson
Slender: The 8 Pages © Mark J. Hadly
Pattern made by me