im looking for this quick view plug in
do you guys know what is this the name?
Hey Jeon,Seems like the quick add option which is allowing you to select size variants (as seen in your link) belongs to a premium theme. There are some shopify apps which you might find useful:1. Quick Select: Size Swatch
2. Quick View: Quick View By Secomapp, Quick View & Color Swatch ++Let me know if this helps. Cheers!