Split Shank Sizes, and the One That Stops a Band Stacking

In this guide

    By Clint Casmiro, Co-Founder, Smiro Studio, Toronto · Updated October 22, 2026

    Short answer: A split shank is a band that opens into two as it reaches the ring head and connects into the petals or prongs. We make it in sizes: a baby split, a small split and a medium split, each opening a little more from the side and top. If you want a wedding band to stack flush, the split must start above the bridge. A split that starts too low pushes the band away.

    Make sure you know this before you buy a ring, so you do not end up with a big split shank that stops a band from stacking.

    Split shank sizes and wedding band stacking Watch on TikTok

    What is a split shank?

    The band splits into two as it rises and each side runs into the head. Compare that to a straight cathedral, where the shoulders go straight up. A split shank flows so the band and head look like one piece. See both in split shank vs cathedral.

    What sizes can a split shank be?

    We build three: a baby split shank, a small split shank and a medium split shank. Each opens to a different degree, and you can see the difference from both the side profile and the top. Read about the smallest one in what is a baby split shank.

    Why does split size matter for a wedding band?

    Most of our clients want a wedding band to sit flush against the engagement ring. If the split starts low on the band, the two arms take up the space where the wedding band would sit, so it cannot slide in close.

    Where should the split start?

    Above the bridge level. Then the lower band stays a single straight piece and the wedding band can sit tight against it. More on that in how a wedding band sits flush with a tulip basket.

    Which size should I pick?

    Baby if you want it subtle, almost hidden. Small for a visible split that still stacks well. Medium if the split is a design feature you want noticed. All three can be built to stack.

    Does a split shank change band width?

    The band below the split can stay as thin or thick as you like. The split only changes the shape near the head. More in band width and taper.

    Want a split shank that still stacks?

    A free 30 minute video call with Clint or Karina. Bring a photo, a budget, or nothing at all.

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    Questions we get about this

    Can any split shank stack with a band?

    Only if the split starts above the bridge. We plan that before anything is made.

    Is a split shank weaker?

    No. Both arms are solid metal and spread the load into the head.

    Can I add diamonds to a split shank?

    Yes. Pave on one or both arms works well and adds sparkle near the stone.

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