1825, alteration of tiny; teeny-tiny attested from 1867. Alternative form teensy is attested from 1856 (teensy-weensy is from 1872). Also teenty (1844).
Entries linking to teeny
tiny adj.
1590s, from tyne "very small" (c. 1400, perhaps from tine) + -y (2).
teeny-bopper n.
also teenybopper, 1966, from teen (n.) but also felt as influenced by teeny. For second element, see bop.