Is ribosome bigger than lysosome?

No, a ribosome is smaller than a lysosome. 

Ribosomes range in size from 20 to 30 nanometers, whereas lysosomes range in size from 0.1 to 1.2 micrometers depending on the materials taken up for digestion. 

1 micrometer (μm) = 1000 nanometers (nm)