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[MalteseLizzie]

I'm working on Alice's dress from Sy Fy's 'Alice' mini series, and I'm trying to understand how to add pleats. I didn't realise at first that there were pleats at the back of her dress.
This is what it is meant to look like


this is what the back looks like at the moment


My idea to fix it is to open up the side seams of the dress, and insert triangular pieces, then iron them down.

And hopefully the end result will look like this


Would this work? Or would it be better to cut slit in the skirt at the back and insert rectangular pieces to create the pleat?

[Penlowe]

The kind of pleats you want are actually trapezoidal, but closer to a rectangle than a triangle. This is a sketch but I strongly recommend getting a pattern that has this type of pleat to at least look over instead of just winging it. Precision is important in a pleat like this, do it wrong and you will wind up with a lumpy butt.

[MalteseLizzie]

Great idea Penlowe: thank you.