"So I would say a maximum squad of 25, that's excluding the development squad."
As well as Partington, who Howe hopes will now play at centre-back, and Flahavan, young Liechtenstein international keeper Benji Buchel is also considering a new one-year deal
In addition, three-month contracts have been offered to youngsters Jordan Chiedozie, Josh Wakefield, Harrison Gilkes, Aristide Bassele and Dan Strugnell.
Fletcher, 40, told BBC Radio Solent last week he hoped to continue playing for the Cherries but if that was not possible would hope to remain at the club in some capacity.
"I'd like to keep playing," Fletcher told BBC Radio Solent.
"I want to stay at the club, I love the club, I've been here 20 years.
"Whether I play one minute or 10 minutes, doesn't matter. My role has changed so much. I have a lot of other roles in the club.
"Hopefully I'm a big influence in the dressing room and I know that's a big part of my game. Whether I play or not does not affect me like it used to because I still have a part to play in and around the club.
"I've only played 11 games [prior to Saturday's fixture against Tranmere] but I've never felt more part of the squad."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.