Lululemon double layer sports bra

RESALE from another posher. Accidentally pressed “accept order” & meant to report an inaccurately described item to return. But GREAT BRA Lots of support I truly wish it fit but it does not. She said it was size 8 but I own 5+ different lulu bras all size 8 and this one feels like two sizes too small. -I assume size 4 but could be 6. I have no way of proving size but it is size 4-6 I assume b/c I could get it on but it was very tight. -it has low round back -great condition -I paid $35