I will not pretend to quote exact prices because courier rates change constantly and depend on route, weight, dimensions and fuel surcharges, but the structure is predictable everywhere. Express international shipping is priced on whichever is greater of actual weight or volumetric weight, so a light but bulky box costs more than people expect.
As a rule, express courier service costs several times what regular airmail post does for the same parcel, and the premium buys speed, tracking and customs handling. Economy options from the same courier companies, and postal services' tracked airmail, sit in between and suit non-urgent shipments well.
To get real numbers, use the online rate calculators every courier and postal service publishes; they quote instantly from origin and destination postcodes plus weight and dimensions. Two tips that save money: booking online is often cheaper than walking into a counter, and consolidating several small items into one shipment beats sending them separately.