Melody Mary 10 Hole Harmonica is large enough to fit in your hand and has 10 holes. It is called 10 holes harmonica. One hole allows you to make sounds with both "suck" and "blow" and has 3 octaves. Melody Merry has many keys. Specifications: Size: Harmonica approx. 4.0 x 1.1 x 0.9 inches (102 x 27 x 22 mm); Weight: approx. 2.1 oz (55 g); Case size: approx. 4.3 inches (110 x 40 x 27 mm); Weight: approx. 3.2 oz (90 g) (including the main unit) in the player. I want to hear phrases. This is the 1st position. → Choose the same key as the song key ■ You want to play a bluegee phrase. This is a 2nd position. > Select a key 4 degrees above the song *Please note that we cannot accept returns and cancellations after shipment due to the nature of the product.