I'm considering a few purchases from Threadless at the moment, but worry about the import tax and duty these days. I once bought about 9 t-shirts in the sale and got a £50+ duty tax, when i went to pick the t-shirts up from the sorting office. I wanna buy stuff, but wanna try and eliminate the duty you have to pay to collect the goods, does anyone know the rule of thumb or actual duty rules for how many items or a certain value of stuff you can buy, before getting taxed at the collection point. I'd be really grateful for some advice.
Thank you all muchly!

My girlfriend is a size 10, but she's really slim and tall and I personally reckon she's a size 8.
What size T-shirts should I buy her

Are XL hoody's massive or to put it more bluntly are they for really fat people. I really wanna buy a couple hoody's but the ones I weant are XL. I'm about 6 foot 3 but skinny (thin). Will an XL be to big on the stomach for me? Anyone care to comment on the fit?

I ordered aroun/d 7 tshirts and one hoody to come over to the UK and on top of my DHL global mail charge, I faced a £50 import charge from the post office. Is there anyway around this charge, I have heard that lower the quantity of your order disqualifies your import charge. Does anyone know anything about this?