Issue when adding age sizes on Pyjamas!

Hello everyone!

I keep having a issue when trying to add month sizing along side year sizing when listing pyjamas.

We are relatively new to listing on Amazon so any help would be greatly appreciated as the Amazon don’t seem to have an answer as of yet!

I have tried all different types of combinations in the age range description, gender etc and just can’t work out where I am going wrong.

Thanks in advance!

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