45.5" playing length is standard.

The shaft length from the end of the adapter tip to the end of the grip is 44 1/2" which will make the overall playing length of the driver be 45 1/2".

I thought Titleist driver standard length is 45"

Has been 45.5" since the TS line was introduced back in 2018.

Lou, I’m pretty sure Titleist changed their standard driver length to 45.5” starting with the TS series.

Driver standard playing length has been 45.5" for several years now.

Hi, standard is 45 1/2 for Titleist driver.
Mainly all OEM are using longer shafts than a 45 inches since many years. The reason is the greater distance obtained with a longer club due to the longer radius generating more speed.
The major problem is dispersion and control.
I am playing a 45 inches because it is easier for me to hit the middle of the face. This is increasing distance also.
Also, one thing to think about is when you cut 1/2 inch of driver, this is reducing swing weight by 3 points. So the head weight should be increase by 6 grams.
At time of fitting, it is where you should try various lengths and different swing weights, to have a better fit.

Titleist increase the standard length starting with the TS models - TS1 was 45.75" and TS2, TS3, and TS4 being 45.5". The current GTs are all 45.5" for men, 44.5 for women.