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

Size: 18 inch

Note: All included, unable to test due to hardwiring. Return with in 7 days.

https://www.wayfair.com/home/pdp/mercer41-18-inch-led-ceiling-light-flush-mount-light-fixture-crystal-ceiling-lights-ceiling-light-fixtures-ceiling-mount-w111372775.html