These four items come up constantly and each one fails in a different way. Golf clubs and guitars are long, which runs into length limits rather than weight. Bikes are simply large and usually need to be part dismantled. Books are the opposite problem: small, extremely dense, and the one case where weight bands bite before size does. The published ladders make the last one easy to answer precisely.
Golf clubs and guitars: length is the constraint
A golf bag runs to about 130cm and a guitar case to about 110cm, and both are light for their size. That combination means they are priced on volumetric weight and assessed against maximum length limits rather than the scales. Many standard parcel services cap the longest side well below a golf bag's length, so the product you need is one that explicitly accepts oversized or long items. Check the maximum length before pricing anything, because a service that refuses the dimensions is not cheap at any price.
Packing a guitar so it survives the journey
A guitar in a hard case is not ready to ship. Slacken the strings to reduce neck tension, pack the headstock area so the neck cannot move inside the case, and fill the space around the body. Then box the case itself with cushioning on every face, because the case protects the instrument from impact but not from being dropped on a corner. The neck joint and the headstock are where guitars break in transit, and both failures come from movement inside the case rather than from crushing.
Bikes are a dismantling job
A boxed bike is usually within weight limits and comfortably outside size ones unless it is broken down. Remove the pedals, turn or remove the handlebars, take off the front wheel and, on many boxes, drop the seat post. Protect the frame tubes individually, since frame to component contact in transit is what causes the scratches and dents that matter. Disc brake rotors bend easily and should come off or be protected. A bike specific box is worth sourcing, because a generic carton rarely holds the shape under stacking.
Books are dense, and the bands catch you early
Books are the one item here where weight rather than size decides the price. A modest box fills the lower bands quickly: Royal Mail's Small Parcel stops at 2kg and 3.95 pounds bought online, Evri prices its 1 to 2kg Small band at 3.52 pounds and its 2 to 5kg band at 6.59 pounds, and past that Parcelforce's ladder runs 11.95 pounds to 5kg, 14.20 to 10kg and 17.95 to 20kg. Splitting a heavy load of books across two boxes in lower bands frequently beats one box in a high one, which is the opposite of the usual advice.
Questions people ask about send golf clubs
How do I post golf clubs?
Use a service that explicitly accepts long or oversized items, since a golf bag runs to about 130cm and exceeds many standard length limits. It will be priced on volumetric weight rather than on the scales.
How should a guitar be packed?
Slacken the strings, immobilise the headstock and neck inside the case, fill the space around the body, then box the case itself with cushioning on every face. Neck and headstock breaks come from movement inside the case.
Is it cheaper to send books in one box or two?
Often two. Books are dense, so a single box climbs into a high weight band quickly. Evri publishes 3.52 pounds for 1 to 2kg and 6.59 for 2 to 5kg, while Parcelforce's ladder reaches 17.95 pounds at 20kg.
What has to come off a bike before shipping?
Pedals, front wheel, and handlebars turned or removed, with the seat post dropped on many boxes. Protect frame tubes individually and remove or protect disc rotors, which bend easily.