Here are 4 pair of boy's athletic shorts, all with an elastic waist and drawstring:

1.  Athletic Works brand, black,  100% Polyester, size M (8)  Inseam:  7"

2  bcg brand, black, 100% Polyester, size S (8)  Inseam:  8"

3.  bcg brand, black with white trim, 100% Polyester, size S (8)  Inseam:  4.5"

4.  DSG (Dick's Sporting Goods) brand, blue, 100% Polyester, size S (8-9)  Inseam:  7"