From the brand

Product description
PICK YOUR SIZE & COLOUR: Once you know your size, you can now choose the colour of your ring from the swatch card provided in the box. The swatch card showcases all 5 colours: Aster Black, Space Silver, Bionic Gold, Matte Grey, and Raw Titanium. Find the perfect match for your style.












Anmol Singh ANDY (verified owner) –
Best for sizesGood
Prabhakar (verified owner) –
Too Good! A must Pre-buy.Very nicely packed. Very convenient and light weight. Very useful before buying actual ring. Comfortable. Too many size options. Wear overnight to get used to actual size fit.
Ahmed Masum (verified owner) –
GoodGood 👍
Zurich31 (verified owner) –
Sizing ringsShould not charge for this…especially if you buy the ring
Martina Ullmann (verified owner) –
Ein tolles SetIch war echt überrascht, vielleicht hätte ich die Beschreibung bzw. die Bewertungen genauer lesen sollen. Man bekommt für 0,20€ ein Set von Ringen aus Kunststoff mit denen man Testen kann welche Ringgröße man ohne Probleme länger tragen kann. Und es gibt auch noch einige Farbmuster dazu. Das hatte ich nicht erwartet. Wie man solch ein Set negativ bewerten kann ist mir ein absolutes Rätsel.
Oasis (verified owner) –
Utilissimi!Molto utili per provare la misura dell’anello da acquistare e così non fare errori, ci sono praticamente misure per ogni tipologia di dito, si parte da quelli molto piccoli fino ad arrivare a quelli decisamente molto larghi. Sinceramente anche questi di prova, esteticamente, non sono male. Prezzo ottimo!
Cherry MP (verified owner) –
No nonsense sizing rings!The box has various sizes and the build quality was good. It was just plastic ring and do not expect any tracking using the sizing ring. It can only help you understand how the real ring would be. After two nights usage I lost interest in the real ring because the size of the ring I felt could be obstructive to daily routines. However, this is a personal opinion and need not be applicable to all. The ULTRAHUMAN rings are best in fitness tracking at least as per the reviews I read online.
LiQuiD – Verified Buyer ✓ (verified owner) –
Essential and easy – don't skip this before ordering your smart ring!I was tempted to just guess my size for the ULTRAHUMAN Ring AIR, but I’m so glad I ordered this sizing kit first. The kit includes a full range of dummy rings from sizes 5 to 14, made from lightweight, comfortable material that feels very similar to the actual smart ring. Wearing each size for a full day (and night) gave me real confidence in my choice – something a simple finger measurement or printable guide just can’t provide. What I appreciated most was being able to test the fit across different conditions. My fingers swell slightly overnight and after exercise, and the sizing kit allowed me to find the perfect “Goldilocks” size – snug enough to stay secure but comfortable enough to sleep in and remove easily. The kit also helped me realize I needed a different size for my index versus middle finger. The process is straightforward: try on the different sizes, wear them during normal daily activities, and then confidently order your final size online. It saved me the huge hassle of an international return or exchange. For a relatively small investment (often refundable or discounted off the final ring purchase), this sizing kit is absolutely worth it. Five stars – don’t skip this step if you want your smart ring to fit perfectly!
Raunak (verified owner) –
Niicee..God quality and very useful . Variable sizes available . Value for money product.
Shivam T. (verified owner) –
Very useful productThe ring size guide made buying a ring so much easier. Without it, choosing the right size would’ve been a real hassle. And it’s also used by everyone in my circle.
Mahesh (verified owner) –
HelpfulThis sizing kit makes it easy to find the perfect fit before buying the smart ring. The sample sizes are comfortable to try and help avoid size confusion later. A simple and useful step for choosing the right ring size.