The invention relates to isolated peptides and chimeric polypeptides derived from Saposin A that have anti-angiogenic activity. These peptides are small, consisting essentially of at least 10 consecutive amino acid residues from the 3 lst-50th amino acid residue of Saposin A. The invention also relates to the use of these isolated peptides and chimeric polypeptides in compositions for the treatment, prevention, and inhibition of angiogenesis-related diseases and disorders such as cancer and cancer metastasis.