Confused about Paypal charges?

I have recently begun selling on ebay but the charges Paypal are making are confusing me. The item I sold went for �5.50, with postage costs of �3.00. Therefore I should makes �8.50 minus ebay insertion fees etc. Now I go print a packaging label, which takes me to Paypal. The item weighed only 0.1kg and Paypal charges me �4.41 to print a packaging label! I didn't know you had to pay to print the label, nothing like that on Amazon. So I still have to take the package to my post office and pay to send it, that's most of the �8.50 I made gone :( Can anyone help me figure out the charges Paypal are making? Thanks.