1) Hardly noticeable 2) Itsy-bitsy 3) Ittsy-bitty 4) Itty 5) Itty-bitty 6) Little-bitty 7) Minuscule 8) Minuscule informally 9) Quite wee 10) Really really tiny 11) Slang for wee 12) Super-small 13) Teeny-tiny 14) Teeny-weeny 15) Tiny, to a tot 16) Very, very small 17) Very, very tiny 18) Weensy predecessor 1) Wee