La Fixsun Gauze Linen Double Layer V-Neck CR95
Same popular style as the solid linen FBT95, but the linen is a light gauze-y plaid weave. The front panel is two layers on this style.
The model is wearing the silver gauze - the silver is not a metallic, but is a medium gray. You want these to be an oversized fit so the fabric can keep its texture
When I measure across the top, from underarm to underarm, a small measures about 24 inches (about 48 all the way around)