Size 4-6 Lululemon Salute the Sun

Versatile Salute the Sun Openback Tank. EUC Only worn a few times. I'm not sure if this is a size 4 or a size 6. I have one in blue for sale that definitely is a size 6, but this one feels smaller all around and I am almost positive that it is a size 4. Great tank for HIIT, yoga, strength training. Open slit in back is comfortable, and airy for multiple types of workouts. Color is a heathered purple.