190000

https://osce.usmission.gov/u-s-statement-for-the-vienna-document-joint-pc-fsc-chapter-iii-meeting-2/

"We assess that Russia probably has massed between 169,000-190,000 personnel in and near Ukraine as compared with about 100,000 on January 30. This estimate includes military troops along the border, in Belarus, and in occupied Crimea; Russian National Guard and other internal security units deployed to these areas; and Russian-led forces in eastern Ukraine."

1. https://www.theguardian.com/world/2022/feb/18/russia-has-amassed-up-to-190000-troops-on-ukraine-borders-us-warns
2. https://www.spiegel.de/ausland/joe-biden-ueber-wladimir-putin-ich-bin-ueberzeugt-er-hat-sich-entschieden-a-11ba0d5a-68a1-4bc2-a5bf-442c1a49f8a6 :"Zuvor hatte die US-Regierung eine Schätzung veröffentlicht, wonach Russland bis zu 190.000 Soldaten in der Nähe der ukrainischen Grenze zusammengezogen habe"