Mobility | denim button up crop top

Mobility | denim button up crop top Mobility brand light wash denim jean crop top. Sleepless, tank top. Full button up front, with overall style straps. Strap on back is also adjustable for fit. Size tag says 15, but I cannot find a size chart to compare. I would say it fits like a large, but please reference measurements below. Pit to pit: 20” flat Bottom of garment under bust: 17.5” Perfect for summer, party, festival, vacation, beach, trendy