DO NOT USE Packlink they are scammers, probably in collusion with eBay to rip you off with little recourse for disputing it. I am very thorough with things like measurements and complex size rules and I know my parcel was within the permitted size for the service I had chosen. I booked the service through eBay and got very little in terms of purchase confirmation and tracking. 6 weeks after sending the parcel for an item I sold on eBay, I get an email from Packlink saying I owe them a further £9.00 for oversized parcel. Their measurements against mine were overstated by quite a large margin (15cm+) which means it was over the limit for that service according to them, with no evidence. Their email pretty much says pay the balance OR dispute it with evidence in the form of a photograph with a ruler against the parcel and showing the weight on a scale. I didn't have any photos of the parcel as this never happens normally with Royal Mail or with other couriers. Currently disputing this extra payment with PayPal. If you do use them take lots of photos of the parcel but to be honest just go direct with Royal Mail or a courier it will save you a lot of hassle and mental health issues.