floydbloke:
It came to $16 though. Apparently is it 14 x 18 x 10 cm which produces a volumetric weight of 0.504kg.
You must've been charged for 1Kg - From their website: "The minimum chargeable weight is 500g and is charged in 500g increments thereafter.".
That extra 4g is a bit tight of them, measuring the 10cm side 0.08mm smaller (14 x 18 x 9.92 cm) would have put you back at 500g.
Edit: I'm confident YouShop would have certified scales as that's a bit of a no brainer, but do you think they use rulers/tape measures certified by the US Department of weights and measures? The staff would also need training to ensure the rulers are used correctly - eg: not skewed, twisted, etc. Pedantic, but pretty sure it's the law