Your wrists must be huge. I have the same strap, and if it was any longer the tail would be hanging off further than the retainers could hold it down.
Probably why my tattoo cost so much haha no I don't feel like they are huge
As you are based in UK.
Take a look at YellowDog Straps.
Alex Moss will make you the best strap for your Tactix!
You will be surprised!
Cheers!
According to the spec sheet the nylon strap for the F6 should fit up to a 210mm wrist or 213mm for the F6X. At 6’ 165 lbs I’m not a small guy, but do have skinny runner arms, and I can take my watch off and put it back on without undoing the buckle with it fastened at that hole.