Lululemon Get Set Short Sleeve Tempest Blue / White No Size 10?

Light blue short sleeve tee with white speckles all over and a cut-out at the back. Loose fitting at the top and more fitted at the hem. No size, however I believe this is a 10. Please refer to measurements. Good pre-owned condition. Approximate measurements (taken with the item laying flat): Armpit to armpit - 21" Shoulder to hem - 27"