Is a 6 cm polyp on your colon considered large?

Yes, a 6 cm polyp on the colon is considered large. The size of a polyp is one of the factors that determines the risk of it being cancerous. Polyps that are 1 cm or larger are considered to be at higher risk of being cancerous than smaller polyps. A 6 cm polyp is more than twice the size of a 1 cm polyp, so it is considered to be a large polyp and should be removed.