In original packaging item, may require some assembly. See link for more details:

Size: XL 37-40mm

https://www.wayfair.com/furniture/pdp/chair-surfer-freesize-premium-furniture-leg-caps-xl-37-40mm-polytetrafluoro-pad-16-set-floor-protectors-with-extra-glide-elastic-caps-for-easy-hardwood-floor-protection-no-noise-no-dust-cqir1025.html