8mm Metal Ring Sizer

2026-04-13T20:20:06+01:00

Vendor: Forge and lumber
Type: Rings
Price: 0.00

Stainless Steel Ring Sizer

Find your perfect fit before we forge the real thing.

Guessing your ring size from a bit of string or a printable paper chart is a fast track to a ring that doesn't sit right. Our Stainless Steel Ring Sizers take the guesswork out of it — each one is machined to match the internal profile of the band you're planning to order, so the fit you feel now is the fit you'll get for life.

Built like the real thing (on the inside)

The inside of every sizer is shaped with the same comfort fit profile we use on our finished wedding rings — a gently domed interior that glides over the knuckle and sits comfortably against the finger. That matters. A standard flat-interior sizer can feel a full half-size different to a comfort fit band, which is why so many couples end up with rings that pinch or spin.

With a Forge & Lumber sizer, what you try on is genuinely what you'll wear.

A clean canvas on the outside

While the inside mirrors our rings exactly, the outside is finished in flat polished stainless steel — a simple, neutral profile that lets you focus purely on the fit. Your finished ring is where the character comes in: meteorite fragments, Damascus steel, whisky barrel wood, dinosaur bone, carbon fibre, or any of our signature materials, in whatever width and finish suits you best.

Think of the sizer as the blueprint. The real ring is the story.

Crafted from solid stainless steel

Each sizer is machined from durable stainless steel — smooth, comfortable, and tough enough to survive being posted, passed around the family, and tried on a hundred times over. Accurate to the millimetre and built to last the whole decision-making process.

Wear it for a few days

We recommend living with your sizer for a couple of days before committing. Try it on at different times — fingers swell in the heat, shrink in the cold, and shift slightly after exercise, a salty meal, or a good night's sleep. A few days of wear gives you the most honest read on your true size.

Fully recyclable when you're done

Because they're solid steel, your sizers don't need to end up forgotten in a drawer. Stainless steel is 100% recyclable — pop them in with your household metal recycling or drop them at your local recycling centre. A small ring, a small footprint.

What you get

Individually crafted stainless steel ring sizer(s) in your chosen size(s)

Comfort fit interior matched to our finished wedding bands

Flat polished steel exterior for a true-to-fit feel

Dispatched quickly so you can confirm your size and order your forever ring