In my experience the delivery times with Quelle are very long - about 1 week after ordering I received a mail confirming shipment. When the clothes hadn't arrived 2 weeks after that, I was told that it takes so long because the clothes are shipped from Germany ! Nice to know!
I admit language skills can be a hindrance in ordering and sending back. But LaRedoute and Vertbaudet as indeed many online clothes shops have a pretty straightforward system:
Keep what you like.
Re-fold the clothes you want to return and place them in the polythene wrappers they came in.
Put the whole bundle into the packet or box they came in.
Take the sticker with the return address off the invoice slip/delivery note and stick it onto the box/packet and off you go to the post office.
Then deduct what you sent back from the invoice and pay the rest....
I agree with C&A - good prices for organic cotton jeans for kids (and men)... And their styles fit my slim boys better too.