Some cats need claw trimming and others maintain their claws well with normal activity and scratching. Age, mobility and individual claw growth affect the decision, so check rather than assume. If claws become overgrown, catch repeatedly or appear to curve towards the paw pad, ask your veterinary team for advice. A scratching post is useful enrichment, but it does not guarantee that every claw will remain an appropriate length. If trimming is needed, have someone competent show you the correct technique and how to avoid the sensitive quick.
Do not attempt it while the cat is struggling or if you cannot see clearly. Keep sessions brief and stop before the experience becomes a fight. Changes in willingness to use a paw, walk or scratch should be assessed rather than treated as a simple cosmetic nail problem. Make claw checks part of an agreed care routine, especially when someone else looks after the cat, so overgrowth is not missed between grooming appointments.
For product comparisons alongside this advice, see Sisal Pair scratching mats and Paw-Villian cardboard scratcher. The details below explain their sizes and uses.
Further reading: cats.org.uk; pdsa.org.uk; rspca.org.uk; bluecross.org.uk; cats.org.uk.
Sisal Pair scratching mats
Paw-Villian cardboard scratcher
Scratch Central