Design and manufacture of watch straps

In addition to designing the themes for the watch, I am also developing the craft design and manufacturing of the straps.

Could you give me the technical catalog of the straps?

And I would also like you to provide me with the metal pin that makes the union between the strap and the watch.

They are standard size watch straps.
You can get watch strap pins online. Galaxy watch strap pins are built into the watch strap.

Samsung Developer Program