How common is bullying at primary school?

[WoolyMama]

I need a bit of reassurance I think.

I started a thread about uniform and some of the replies have made me even more nervous about dd1 starting primary next year.
She's confident and she gets on well with other kids but she absolutely tiny and is going to be one of the youngest in her year.

It seems like a really good school but now I'm worried that it's the norm even in schools that are considered good.
Several posters were talking about bullying even from older children.

In my experience little kids (years R-3) will tease each other and wind each other up but won't target a particular child for bullying. At this age they're remarkably tolerant of differences I've found and will just accept "Joan is scared of X", "Jimmy has a bad leg and can't run". Older children occasionally bully but primary schools are fairly well equipped to deal with it. In secondary school it can be much more of an issue (the children are taught by many more teachers who won't be aware of the friendship dynamics, there's social media, less supervision etc).

I think what a lot of people call any unpleasant behaviour bullying - which it isn’t, of course. Most children love their primary schools. Most are very happy.
Most will fall out with friends at some point, change friendship groups and hear some unpleasant words. That isn’t bullying and most children cope just fine.
Size is irrelevant unless a child is so fat they can’t play with other children and become isolated. I have one that was tiny as a child (still is) and summer born, youngest in year children. They were absolutely fine and quite able to hold their own in class and on the playground.

I think the very young ones can get into disagreements but it’s not really going to be full on bullying at that stage. By the time they are in Y3, bullies will emerge.

By the time they get to Y6, they could be fully fledged bullies sadly.