My palm diameter is 12cm, the heel of your hand to Fingespitze the middle finger there are with me 21cm. Everything else definitely as MADE IN JAPAN. According exhausting and painful were longer Zocksessions with the PS Vita with me. This handle fits perfectly on the Vita, it wobbles nothing, is easy to assemble and take off again, and does not cost much. And my hands have finally something to which they can cling. Very, very pleasant. Full marks!