SirHumphreyAppleby:neb: It's this, seriously undersized push blocks for a table saw.
It didn't have the usual disclaimer stating you should allow for 2-3cm difference in measurement?
That's OK for something like craft supplies where a sheet of something may be cut 1cm shorter but this was clearly listed as 100x200mm not 70x150, that's not a 5% variation but an item that's half the size of what was advertised.
In any case though I've gone for the partial refund for the reasons I gave in an earlier message, that it's going to be an uphill battle convincing anyone who isn't familiar with how they're used that the difference is significant.