The Titanium 5D (5mm D-Ring)

Use Project Atomic’s ring size guide before ordering. These Grade 2 titanium rings use a comfort-fit interior, but width still affects how a band feels, so measure rather than assuming the same fit across every profile. If you are between sizes, use the guidance on the size page before choosing.

If the size is wrong, an unworn ring can be exchanged within 30 days. Start with the ring size guide and pay attention to the width you are buying, particularly when moving from a narrow 2.5mm band to a broader 6mm or 8mm ring.

Yes. Low weight is one of the most noticeable differences between titanium and tungsten carbide. Grade 2 titanium gives the ring a light feel on the finger while retaining the clean, technical character of a real engineering metal. It is a useful choice if you like the material story without the substantial heft of tungsten.

Project Atomic doesn’t offer resizing, so choose the size carefully before ordering. Use the ring size guide first. If the fit is wrong, send the ring back unworn within 30 days and it will be exchanged for another size where possible.

The “F” engraved inside the band is Project Atomic’s maker’s mark. It stands for Fahrenheit, referencing the high temperatures associated with producing and working with the materials behind the range. Every Project Atomic ring carries the mark inside the band.

Yes. Doubling the width gives the curved outer face considerably more visual presence, so the D profile becomes easier to read across the finger. It remains relatively restrained compared with the 6mm and 8mm options, but it no longer looks like a fine stacking-style band. The titanium construction keeps the increase in visual size from translating into tungsten-like weight.

It occupies the middle ground for someone who wants a ring that is clearly visible without choosing a broad band. The rounded exterior gives the 5mm width a softer outline, while titanium keeps the physical feel light. Wider versions put more emphasis on the band itself; this size keeps the proportions more measured while retaining a distinct curved profile.