I hope you were able to get the help you were looking for...
Be aware most IKEA bedroom furniture is either soft pine or particle board which won't last long!
You'd have to go inside the store for that kind of help.
You definitely have to go in of you want someone to take the time to put something together for you. Ikea is a do it yourself furniture and accessory outlet.
They have wide range of closet and i hope you can find your desired one there.
I'm sure if you go to the store someone can help you.b
I think an associate can help you in the store if you go in with your dimensions.
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