In a general way we can resume castanets sizes like:
- Size 3: kids
- Size 4: kids and women with small hands.
- Size 5: most of women or men with small hands
- Size 7: generally recommended for men.
Spanish castanets size it is a quite personal decision and there is really not a defined way to chose the perfect size. As orientation we can chose our "correct" size depending on our hands measures:
Measuring from point A to B we can say that:
Less than 7 cm-> Size 3
Between 7 & 8.5 cm -> Sizes 4 y 5
more than 8,5 cm ->Size 7