Rhein Fils Calypso rubber watch strap with folding clasp
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Discover the ultimate accessory for your watch with the "Calypso" watch strap from Rhein Fils. Crafted from high-quality rubber, this strap offers not only exceptional durability but also unparalleled comfort. The finely textured surface gives the strap a modern touch, while the ergonomic folding clasp ensures your watch strap always fits perfectly and is easy to handle. Ideal for athletes or for use in the summer months, as it is water-resistant. Available in black and in three different widths, the Calypso watch strap suits every watch and every style.
Measure
To find the right watch strap, it's important to know the measurements. Always measure the lug width on the inside.
Wide push clock
The lug width of the watch is measured on the inside of the case. In the illustration, it is 20 mm.
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length
The length of the watch strap is calculated from the combined length of the two pieces. The clasp is not included in the measurement. The appropriate length is determined based on your wrist circumference. Please note that the watch itself also contributes to the total length of your wrist circumference.
The lengths are given on the page as follows (lengths without clock):
- XS: ca. 55 x 90 mm
- S: ca. 65 x 110 mm
- M: ca. 82 x 120 mm
- L: ca. 90 x 130 mm
The length may vary slightly depending on the manufacturer.
Wide clasp
The width of the clasp is measured on the inside. Watch straps often taper from the watch to the clasp. This means that the width of the clasp is narrower than the lug width. This is important to consider if you want to continue using the clasp of your old watch strap or if you want a folding clasp. In the illustration, the clasp width is 18 mm.
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Band thickness
The thickness of the watch strap, also called the strap thickness, is the distance from the inner lining to the upper leather. The heavier the watch, the more sensible it is to choose a thicker strap. The thickness often tapers towards the tip. In the illustration, the strap thickness is 3 mm.
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Measure
To find the right watch strap, it's important to know the measurements. Always measure the lug width on the inside.
Wide push clock
The lug width of the watch is measured on the inside of the case. In the illustration, it is 20 mm.
![]()
length
The length of the watch strap is calculated from the combined length of the two pieces. The clasp is not included in the measurement. The appropriate length is determined based on your wrist circumference. Please note that the watch itself also contributes to the total length of your wrist circumference.
The lengths are given on the page as follows (lengths without clock):
- XS: ca. 55 x 90 mm
- S: ca. 65 x 110 mm
- M: ca. 82 x 120 mm
- L: ca. 90 x 130 mm
The length may vary slightly depending on the manufacturer.
Wide clasp
The width of the clasp is measured on the inside. Watch straps often taper from the watch to the clasp. This means that the width of the clasp is narrower than the lug width. This is important to consider if you want to continue using the clasp of your old watch strap or if you want a folding clasp. In the illustration, the clasp width is 18 mm.
![]()
Band thickness
The thickness of the watch strap, also called the strap thickness, is the distance from the inner lining to the upper leather. The heavier the watch, the more sensible it is to choose a thicker strap. The thickness often tapers towards the tip. In the illustration, the strap thickness is 3 mm.
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