1
The kitten is very tiny.
Start by signing 'kitten', and then follow up with the sign for 'tiny'. To truly capture the meaning of the English sentence, make sure to squint your eyes and bring your hands very close together to emphasize just how small and adorable the kitten is.
2
I only want a tiny piece of cake.
First, sign 'cake', and then use the 'tiny' sign to indicate the portion size you desire. By keeping the space between your hands extremely narrow and pursing your lips, you clearly communicate that you only want a very small, bite-sized piece.
3
She found a tiny bug on the leaf.
After establishing the subject by signing 'bug', use the 'tiny' sign to describe its physical size. Bring your dominant hand down until it is almost touching your non-dominant hand, showing that the bug on the leaf was incredibly small.