This is a 90's style convertible backpack, where it can be worn with a single strap or two.
It has closed with a strap through double rings and has a cinch closure on the inside. The large internal pocket has two slip pockets. For security, there is a zipper pocket on the back, which sits against your back when wearing this bag.
The size is approximately 11 wide x 14 tall x 5.5 deep
Lucy Backpack pattern by Swoon