Without getting rid and buying a whole new pair.
I just bought a bargain pair of curtains (£10 Next) for our living room. Measured and thought they're the right size, washed on a cool wash, not shrunk but they aren't wide enough! They are too narrow by about 30cm on each, and they are eyelet curtains so no header tape than can be widened.
I was thinking if I could get some plain fabric, as these are patterned, in the background colour, I could add a panel to each side, but not sure which side to add it to, the middle or the outside edge.
Just wondered if this was a silly idea as I can't see anything online, just lengthening them the same way with a panel across the top or bottom, which I think looks nice.
I have attached a photo so you can see the fabric, so if anyone knows the name of these I would be most grateful!