'When listing in the first place if possible parcel the item so you know the exact weight.'

Yes - for some items, it can be difficult to know exactly how much packaging you will need until you actually pack the item. If you don't want to pack in advance, all you can do is be on the safe side & overestimate, rather than have to worry about the parcel being overweight.

Not all buyers take kindly to a transaction being cancelled & refunded - they may decide not to repurchase.

This postage pitfall was brought to you courtesy of Simple Delivery... 🤖