Sankyo Brand Mini Music Box Movements.  Dimensions: 1-5/16" x  1-11/16" x 5/8" high. 
Each music box movement purchase includes one free key of any available type and size. If you have a preference, please specify the key size and type in the comments section when you order. If none is specified a mid-range key will be included.

Music title inventory is listed on the Product Detail page.