Complete value for money, this is probably the best strap I have ever bought!
Very supple strap. I found the grain to be more subtle than what is shown in the first picture (strap-only); it is closer to what's pictured in the second photo above (paired with the speedy).
Leather is supple and comfortable on the wrist! Goes perfectly with my speedy. I would go with a S for a 6.5” wrist
The Chicago Blue Russian Hatch Grain strap perfectly compliments my Grand Seiko SBGJ231. The quality of the strap is top notch and is on par with some of my $200+ straps. It was very soft when I got it and required no break in period. I highly recommend Delugs and their straps.