Most Sinn watches, including the 556 and 104 models, use a 19mm to 20mm lug width, while the larger U1 diver typically uses 22mm. Check the width stamped on the inside of your old band, or measure lug-to-lug across the case, to confirm your exact size before ordering.
Yes, we stock quick-release replacement bands that install without tools, as well as traditional spring-bar styles that require a small spring-bar tool. Both fit the same lug openings on Sinn cases, so choose whichever style you're more comfortable installing.
Steel bracelets typically use push-pins or screw-pins to remove links. If you're not comfortable removing links yourself, most local jewelers or watch shops can resize a steel bracelet for a small fee.
For the rugged U1 dive line, silicone or steel holds up best to water exposure and daily wear. For the dressier 556 and 104 models, a leather band gives a more classic, understated look.