A stock line, although there are times when some sizes are out of stock temporarily.
Re-stocking times will vary between 2 - 4 weeks depending on the time of year.
Sizes 26-30 are available made to order - see Netball Skirts, large sizes to order.
This skirt is the traditional wrap-around pleated netball skirt that does up with an adjustable slider on the waistband.

Prestalene is polyester viscose fabric - it's what pleated netball skirts and school skirts have been made from for years.

Skirts are not made in 'children' or 'adult' sizes. 
The sizes are based on the waistband measurement as shown below, and you may find that you'll need to take a bigger size than you would normally wear. 

The waistband measurement below has been taken with the adjustable slider done up midway, and you can expect up to 5cm adjustment either smaller or larger depending on how far you do it up.