Actually a little bigger than that.
I noticed one a little while ago (over a week ago), little enlarged, but not unwell. Then this week I got a 24/48 viral type bug which gave me prickly skin and a fever for a couple of days, over that now (DH had it too).
And since then my lymph nodes are rock solid, perfectly round and getting a little bigger not smaller each day.
That's normal right? I have been walloped by bigger bugs than this and had such hard large lumps come up quickly like that so it's caught me by surprise. I have had swollen lymph nodes before, but one side more than the other, and flatter and not so hard.