"Prompted by the arrival of our fabulous linen sheeting range," this shop has instructions and measurement charts for making fitted sheets for mattresses of many sizes. Sadly for me, the shop only sells the linen in-country, and they're in Australia.
The Half Square Triangle Pouch is a flat square-shaped quilted pouch with a zipper running diagonally across the front. This pouch is a great weekend sewing project for an intermediate. Get the facelifts to make scrap material pattern at Craftsy.