WoW Classic's realm population numbers are relative, which explains why even Medium realms have terrible queues
Realm - Wowpedia - Your wiki guide to the World of Warcraft
WoW Classic Server Transfer - Transferring to Full Server Later
WoW Classic & WoW Classic TBC Server Populations
Thousands of World of Warcraft Classic players descended upon a single server to get a fresh levelling experience - and it was absolute chaos | Eurogamer.net
Classic Era Servers Now Medium Population! - Warcraft Tavern
How Badly did Blizzard Underestimate WoW: Classic's popularity? - Inven Global
WoW Wrath of the Lich King Classic server populations in 2023 (March) - Dexerto
WoW Classic Server Population 2023: Best Place to Check - Gaming Pirate
All the WoW Classic Server Populations for the year 2021
Classic WoW Realm Population Report - Data Aggregated Through Community - Wowhead News
WoW TBC Classic Server: Alles zu Population & Fraktionen
All Wow Classic Server Population Statistics of the Year 2021
Available Realms on WoW Classic Season of Mastery
Classic WoW Realm Population Report | World of Warcraft Classic - YouTube
Blizzard fights WoW Classic queue times with increased realm capacity and better population info