Green’s Dictionary of Slang

of either sex, one who is obsessed by the size of a man’s penis (which obsession determines their willingness to have sex).

1998

I. Welsh Filth 78: Ah heard that she’s a size freak. She finds oot [...] who the guys wi the really big packets are and she’ll only fuck them.

(usu. gay) one who is obsessed by the size of the penis of a potential partner.

1964		Lavender Lex. n.p.: size queen:– A homosexual who is interested only in sex partners who are well endowed with a large penis.
1965		K. Marlowe Mr Madam (1967) 40: All my buddies had parlor-sized organs but I wasn’t aware I was becoming a size queen.
1967		I. Rosenthal Sheeper 41: Calling all dinge queens and size queens – control your appetites.
1970		J.P. Stanley ‘Homosexual Sl.’ in AS XLV:1/2 53: The most popular compound formation involves some nouns plus queen [...] size queen, rim queen, tearoom queen.
1976		J. Hayes ‘Gayspeak’ Quarterly Journal Speech LXI 256–66: Queen [...] may be used to build a limitless series of images: to describe sexual preferences – dinge queen (one who prefers blacks), size queen (one who likes men with large penises).
1979		Maledicta III:2 232: A person intensely interested in the quantity of meat is a size queen (one of the many pejorative uses of queen).
1980		A. Maupin More Tales of the City (1984) 10: ‘Yeah,’ said Michael ruefully. ‘Size queens.’.
1988		H. Max Gay (S)language.
1994		L. Goldstein The Male Body 47: [S]ize queens attend weekly ‘pumping parties,’ where they mix and mingle, all the while admiring the extended wares of the pumpees.
1998		I. Welsh Filth 203: Fags are the biggest size queens of the lot.
2004		L. Redhead Peepshow [ebook] He had at least eight inches down there, and thick, too. I was no size queen but it was nice [...] to feel so completely filled up.
2005		E. Beverage Tom Brown Saves the World 95: Miles muttered ‘size queen’ before bellowing dramatically, ‘Bring in the stunt cock!’ Two eager assistants appeared with a freakishly large plastic penis.
2010		W. Ings ‘Trolling the Beat to Working the Soob’ in Int’l Jrnl Lexicog. 23:1 65: Queen is often preceded by a noun or adjective that indicates a place of residence, character or preference. Indicative of this are terms like [...] size queen (a man who prefers partners with large penises).
2012		(con. early 1960s) E. White in N.Y. Rev. Bks 25 Oct. 🌐 Because I’d hung out in Chicago’s gay coffee shops [...] I knew that someone who liked well-hung men was ‘a size queen,’ just as someone with a small penis was ‘Princess Pencil Meat’.
2019		P. Baker Fabulosa 298/1: size queen someone who likes well-endowed men.
2021		J. Ellroy Widespread Panic 39: ‘The Misty June Christy?’ ‘Nympho size queen’.
2024		J. Meades Empty Wigs (t/s) 537: [H]is erection [was] quivering. Inigo scrutinised it appreciatively; he was known as a size queen, which was of course beneficial to my reputation.

(UK black) used by a male to tell a girl she's his ideal.

2017

hubpages.com ‘Roadman Slang 10 Jan. 🌐 My Size - a strange phrase used by males when describing girls that seem ideal to them, in terms of attractiveness, and hence their ‘size’. e.g. ‘oi, you're my size’.