This is a used black Lululemon Align tank top. I bought it a while ago so it is either a size 6 or 8. Unfortunately the size is not listed on the item. Item on Lulu website: https://shop.lululemon.com/p/women-tanks/Align-Tank/_/prod9600539?color=0001&locale=en_US&sl=US&sz=4&cid=Google_SHOP_US_NAT_EN_X_Hybrid_Top-Sellers_OMNI_GEN_Y23_ag-SHOP_G_US_EN_DM_X_GEN_NO_Top-Sellers-All&gad_source=1&gbraid=0AAAAADL8AvmwOm-2SX10RxE7fn1XZID4Q&gclid=CjwKCAjwgpCzBhBhEiwAOSQWQQ0egFo-aOP3ilS6wOyHM7p2NJAgNme2lhd8Yr52itCm-_sTBKlPsBoCULUQAvD_BwE&gclsrc=aw.ds