A weight indication for items (these are only indications, due to variations in products weight may vary a lot):
MC - 100 gram
LP - 400 gram
2-LP - 550 gram
CD - 125 gram
2-CD - 175 gram
T-Shirt - 250 gram

The Netherlands:
Post.NL: up to 350 grams: 5 €
up to 10 kg: 10 €
up to 20 kg: 15 €

Belgium/Luxemburg/Germany:
Post.NL: up to 350 grams: 10 €
up to 2 kg: 15 €
up to 5 kg: 23 €
up to 10 kg: 30 €
up to 20 kg: 40 €

Denmark/France/Austria:
Post.NL: up to 350 grams: 10 €
up to 2 kg: 15 €
up to 5 kg: 23 €
up to 10 kg: 30 €
up to 20 kg: 40 €

Italy/Spain (ex Canary Islands):
Post.NL: up to 350 grams: 10 €
up to 2 kg: 15 €
up to 5 kg: 23 €
up to 10 kg: 30 €
up to 20 kg: 40 €

Sweden:
Post.NL: up to 350 grams: 10 €
up to 2 kg: 15 €
up to 5 kg: 23 €
up to 10 kg: 30 €
up to 20 kg: 40 €

Poland:
Post.NL: up to 350 grams: 11 €
up to 2 kg: 21 €
up to 5 kg: 30 €
up to 10 kg: 35 €
up to 20 kg: 45 €

U.K./Finland:
Post.NL: up to 350 grams: 11 €
up to 2 kg: 21 €
up to 5 kg: 30 €
up to 10 kg: 35 €
up to 20 kg: 45 €

Bulgaria:
Post.NL: up to 350 grams: 11 €
up to 2 kg: 21 €
up to 5 kg: 30 €
up to 10 kg: 35 €
up to 20 kg: 60 €

Croatia/Czech Republic/Estonia/Greece/Hungary/Latvia/Lithuania:
Post.NL: tot 350 gram: 11 €
up to 2 kg: 21 €
up to 5 kg: 30 €
up to 10 kg: 35 €
up to 20 kg: 45 €

Ireland/Norway/Portugal/Rumania/Slovenia/Slovakia/Switzerland/Turkey
Post.NL: up to 350 grams: 11 €
up to 2 kg: 21 €
up to 5 kg: 30 €
up to 10 kg: 35 €
up to 20 kg: 45 €

Rest of Europe 
Post.NL: up to 350 grams: 11 € 
up to 2 kg: 21 € 
up to 5 kg: 30 € 
up to 10 kg: 35 € 
up to 20 kg: 45 € 

Australia/Canada/Chile/Mexico/New-Zealand/U.S.A. 
Post.NL: up to 350 grams: 13 € 
up to 2 kg: 30 € 
up to 5 kg: 45 € 
up to 10 kg: 75 € 
up to 20 kg: 130 €

Rest of World
Post.NL: up to 350 grams: 13 €
up to 2 kg: 30 €
up to 5 kg: 45 €
up to 10 kg: 75 €
up to 20 kg: 130 €