IKEA Karlby Countertop in Oak Veneer.
Measurements: 74 x 25-1/2 x 1-1/2. Heavy at about 65lbs.
https://www.ikea.com/us/en/p/karlby-countertop-oak-veneer-70335207/
Worked well for us as a desktop supported by two file cabinets.
IKEA Desktop / Countertop (Alameda East End)
This offer has been gifted to someone and is no longer available.