Not good that they are bigger than the brca list reports them to be, but possible that the size is marginally different now to when the brca measured them.
There is always some tolerance to manufacturing, especially plastics! However that's 0.7mm difference to the brca measured size, which over that size is surprising.
As for swelling...it appears to have grown by 0.4mm in 1 direction only which is not a lot, and although I don't know sure as I'm no lipo expert, I would guess at it being entirely possible that the cells inside change in size subtly during a cycle quite naturally.
Since you've not abused them in any way I'd say you have real need to worry about using them...but I guess it can't hurt to raise the issue with the manufacturer and see what they say?!?!
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