How big should a lymph node be before it is considered 'swollen'?

Swollen lymph node.: Generally speaking, lymph nodes are not palpable. And if they are palpable, they are usually very small, certainly smaller than a pea or a jellybean. So swelling of a lymph node would imply that either a small lymph node is noticeably larger or that you’re feeling lymph nodes in an area that you hadn’t felt them in previously. Obviously, clinical context is important.