Kids Clothes Sizes

It seems so strange that we cannot just say get a size whatever, I have noticed it with my clothes, usally a size 16 coversall but sometimes a 14 is more than big enough.
My step-mum got Roo a 5-6 year long sleeve T-shirt last week but it would be too small for Bong who is is 6-7 years, lol.
Why is life so complicated?

Just seems so silly, if they all ogt together and made standard sizes whe could tell Grandma what size to get not have to aske her which shop first. Maybe that is just too sensible, I'm glad its not just me that seems to get confused by the sizings on these things.

These manufacturers do not want a standardize sizes because all of them want their own size pattern to be the standard. They do not know that their egos are hurting the consumers by buying dresses that does not fit. Returning those is a hassle.

Thanks for the best tag rainbow!

I'm glad it's not just me that thinks clothes should be a standard size, it's hard to ask Grandma where she will be shopping and telling her what size she needs to get from that particular store.
Size Zero is a good one - when I was 19 I was still buying my clothes from Tammy Girl - the kids version of Etam, but in grown up sizes needed an 8-10.
Nowadays I am a far more comfortable 16 (ish - depends sometimes less often more) and size zero looks emaciated and in need of feeding too me. I'm so glad I have boys so the only problem will probably be getting them out of the gym if they are like me pre children.