TAPSTER X SAS Graphite
Don't know your ring size?
Minimize the trouble of ordering the wrong ring size. Please follow the instructions below carefully. If you still feel uncertain, it's better if you choose the "I don't know my ring size" option under product size. We will then send you a ring measurement tool, for testing at home.
1. Measure your finger
One of the easiest ways to know your ring size is to measure your finger with a string or strip of paper.
- Start by cutting out a strip of paper that is approximately 0,5 cm wide and 10 cm long. Wrap the paper around the base of the intended finger. Make sure to pull it really tight, since the base of the finger normally is very flexible.
- Make a mark where the paper overlaps with a pen. The length of the paper you measured in millimeters is the perimeter of your finger.
- After finding this measurement, use our conversion chart to find the corresponding ring size. If you have made the measurement technique above and end up between two sizes we recommend going for the smaller size.
If the size of your finger below the knuckle drastically differs in size from the knuckle itself, measure your knuckle as well and choose a size that falls more in the middle of these two measurements.
2. Measure a ring you already have
If you have a ring that already fits your finger well, you can use a ruler to measure the inside diameter of this ring. Just take your ruler and measure straight across the inside of the ring from edge to edge. Take the diameter measurement in millimeters, and then use our measurement-conversion chart to find your ring size.
|
Ring Size
|
Inner Perimeter (mm)
|
Inside diameter (mm) |
|
6 |
51.8 - 54.2 |
16.5 |
|
7 |
54.3 - 56.4 |
17.3 |
|
8 |
56.5 - 59.7 |
18 |
|
9 |
59.7 - 62.1 |
19 |
|
10 |
62.2 - 64.3 |
19.8 |
|
11 |
64.4 - 67.1 |
20.5 |
|
12 |
67.2 - 69.6 |
21.4 |
|
13 |
69.7 - 72.1 |
22.2 |
|
14 |
72.2 - 74.6 |
23 |
|
15 |
74.7 - mm |
23.8 |
- Will start shipping from June 23rd
- Free shipping – shipping costs included
At just 5mm, the Tapster Thin Ring is our most refined payment ring yet—now in a exclusive edition with SAS. Crafted from durable ceramic and water-resistant for everyday wear, it’s designed to blend effortlessly into your lifestyle.
A discreetly engraved SAS logo on the outside adds a subtle nod to your passion for travel, while every tap earns you EuroBonus points—making even your coffee run part of the journey.
No batteries. No charging. Just seamless, secure contactless payments—whenever you need them.
The future of payments is here: elegant, effortless, and built for travellers.
- Scratch resistant
- IP68 waterproof
- Hypoallergenic
- Requires no battery or internet connection
- Certified by VISA and MASTERCARD.
Not sure of your ring size? Simply select the "I don't know my ring size" option when you place your order, and we'll send you a sizing kit. After your purchase, we'll email you a 100% voucher code for a ring. Once you determine your size using the kit, you can place a new order with the correct size.
1. Order your ring.
2. Connect your Mastercard in the TAPSTER app once you have received your werarable.
For video instructions click here
Will start shipping from June 23rd.
Delivery times:
Sweden: 2-3 business days
Norway: 5-6 business days
Denmark: 5-6 business days.
