How can l say no to friends without harming the friendship?

[WildJoker]

I have a couple of good friends who l see about once a week, we’ve known each other for many years, had families, all of which are now grown up with their own families. The three of us are now retired.
A several months ago they both asked me to do a favour for each of them, which l agreed to and they both gave me flowers as a thank you.
Since then, every couple of weeks one or the other asks me to do a similar favour - including for one or two of their relatives. Although they say there is no hurry etc. l feel the pressure to get the job done for them - l now feel taken for granted and pressured, even if they say take my time - problem is how do l tell them no l do want to do this anymore, without losing their friendships.

Develop a sore wrist that's made much worse by sewing, so you're going to have to stop for awhile/forever.

I’d say you’re finding it hard with your eyes so can’t do anymore till you’ve got your glasses sorted. Then when they ask say you’ve not had your glasses sorted yet. Yes it’s the cowards way out but sometimes it’s just easier that way!

They should really offer to pay you then if they are using you as a tailor. It’s really cheeky of them. Shortening a pair of trousers costs £15 a pair.

Just point them in the direction of Wundaweb and let them shorten their own clothes.
Or start asking for a (large) donation to charity. That should put a stop to the frequent requests.