There is only 1 226 frame size. The factory mags are 15rd, but MecGar makes flush fit 18rd mags as well as extended 20rd mags.
Ummm...well then the specifications on the SIG website are incorrect because they have a variety of different specifications depending upon the model - including length and magazine capacity.
That's why I quoted exact models previously - look for yourself.
If you look at the P226 TacOps / TacOps FDE / TacOps threaded barrel
Length: 8.2 inches
Height: 5.5 inches
Mag capacity: 10 or 20 rounds (9mm)
SIG includes the 20 round magazines with the three TacOps models.
P226 Combat
Length: 7.7 inches
Height: 5.5 inches
Mag capacity: 10 or 15 rounds (9mm)
As I have said previously - you have to look at whether the gun has a beavertail or not to evaluate the overall length.
The P226 models with beavertails have an 8.2 inch overall length while the ones without beavertails are 7.7 inches.
The P229 with a beavertail is 7.4 inches - without a beavertail the P229 is 7.1 inches.
That was my point to the OP - you have to look at, and compare, specific model specifications between the P226 and the P229 before you get the full picture of the different OVERALL SIZE DIFFERENCES between the P226 and the P229.
For example - if I compared the overall length of a P226 without a beavertail (7.7 inches) to a P229 with a beavertail (7.4 inches), there is only a 0.3 inch difference.
You need to compare the same features between the two (with or without a beavertail) to get an accurate picture of overall length differences.
And - then there are the TacOps models with the 20 round magazines....
Me? I have the P229 TacPac that came with SigLite sights, STL900 light/laser, short reset trigger, really cheesy plastic holster, two 15 round magazines, and a speed loader - and then I purchased another six, 15 round magazines.