Increase in size is suggestive of progressive growth. In your case, there is no increase is size that is reassuring. Let me tell you some of the key features that suggest the possibility of benign nature.
1. Small in size
2. Decrease in size over time
3. Associated with pain
5. In many cases, lymph node less that 1 cm is clinically less significant.
However, one should always consider a doctor visit if the lymph node does not subside withing expected time.
I hope it helps.