As a Brit, I've only ever heard this as /məz/, never /mız/ (I've also discussed this with my housemates who also have the same experience). I'm going to edit this to change the British pronunciation, unless someone has a source Tristanjlroberts (talk) 20:43, 18 January 2021 (UTC)
Various editors keep adding / removing / adding / removing a pronunciation in /-s/. It's pretty well attested, roughly half the first ten YouGlish videos I looked at use it, including 2:40 youtu.be/1acrUAxFVaw (her transcript has her referring to herself as "Ms. Marie", said with /-s/; a second video is her again, referring to Ms. Diane /-s/); 0:52 youtu.be/Cvl2tHwuvzk (the transcript, and a NYT article titled "LaToya Ruby Frazier, American Witness" on the same person, writes her name "Ms. Renée", speaker says /-s/), 8:22 youtu.be/JJyeKiT8g4g. (For now I put in on the US/GA line but it wouldn't surprise me to also find it in the UK since the various spelled out forms Miss, Missus etc are all themselves sometimes pronounced with /-s/.) - -sche (discuss) 20:40, 9 December 2022 (UTC)
Some women take on their husband’s surname and the title Mrs when they get married. Some women prefer to keep their surname and use the title Ms. --Backinstadiums (talk) 11:34, 3 February 2021 (UTC)
is the plural Mss also an abbreviation? --Backinstadiums (talk) 10:44, 17 March 2021 (UTC)