Compression Stockings/Socks?????

Stephanie • Happily married. 💜 25 years young. Mommy to Maximilliano (7-9-16) and Maverick (10-3-18).
I am flying this Friday. It's a nonstop 2 hour flight. My doctor recommended that I get some compression stockings/socks. Where can I get these and do I need to get a specific kind? I have no idea what to look for.