Here is an easy costume, dress up skirt or easy skirt for a child . Measurements pictured in instructions are for a child sizes 3-6 with a waist up to 23 inches hips 26 inches.
if you need something larger you can easily widen the waist... I will indicate where here in the instructions.
Finished skirt will measure about 11-15 inches long... but you may easily lengthen or shorten skirt to desired length.