1
I only want a small piece of cake.
Sign 'cake', then use the described curved index and thumb handshapes, moving them close together to visually show the thinness or small size of the slice, remembering to purse your lips.
2
She lives in a small house.
After signing 'house', bring your curved index fingers and thumbs close together to emphasize the compact size of the home, puckering your lips to show it is cozy and little.
3
There is a small problem.
Sign 'problem', then use the described handshape and motion, bringing your hands close together with puckered lips to show that the issue is minor and easily manageable.