The term 'itsy-bitsy bits' refers to very small particles or objects. The crossword solutions for this term are 'SPECKS' (6 letters), 'IOTAS' (5 letters) and 'ATOMS' (5 letters). SPECKS are tiny particles of dust, dirt, or other matter that can be seen with the naked eye. IOTAS are the smallest letter in the Greek alphabet and can also refer to a very small amount of something. ATOMS are the smallest unit of matter that can exist and are made up of protons, neutrons, and electrons.