8mm or 10mm Beads: Picking a Size

This is probably the most common fork in the road for anyone building a bead box: do you go 8mm or 10mm? Both sizes cover a huge amount of BC water, and the honest answer is that either one will catch fish on most days. But there are real reasons to lean one way or the other, and once you know what they are, the choice gets a lot easier.

What's the Real Difference Between 8mm and 10mm?

The gap between an 8mm and a 10mm bead is small in the hand but noticeable in the water — it's the difference between mimicking a smaller trout or char egg and matching something closer to a full-sized salmon egg. That extra couple millimetres changes how the bead sits under a float, how much it moves in current, and how it reads to a fish looking up from the bottom of the run. Neither size is "better" on paper; it's about what egg you're trying to imitate and what water you're fishing it in.

When 8mm Beads Make Sense

Reach for 8mm beads when you're fishing clearer, lower water, targeting steelhead or trout that have seen a lot of pressure, or matching the size of eggs already drifting through the system from earlier spawners. The smaller profile is subtler and tends to get more confident takes when fish are being cautious. It's also a natural pairing with lighter hooks — an 8mm bead sits well on a #6–#4 hook, which keeps the whole presentation balanced instead of top-heavy.

If you're mostly chasing steelhead and trout through the fall and winter, an 8mm rotation built around a few natural and translucent tones will cover most of what you need. Our guide to soft beads for trout and steelhead goes deeper into which shades work best in that lane.

When 10mm Beads Make Sense

10mm beads earn their keep when the water's got some colour, when you're fishing behind bigger salmon that drop larger eggs, or when you just want more visibility in faster or deeper runs. The bigger profile pushes more water and holds its silhouette better at distance, which matters when a fish has less time to decide. Pair a 10mm bead with a #4–#2 hook and you've got a presentation that still swims naturally without looking oversized.

This size also tends to shine once salmon are actively spawning and steelhead and char are keyed in on the eggs coming off them. If salmon are part of your season, our soft beads for salmon guide walks through sizing and colour choices built around that bite.

Matching Bead Size to Hook

Getting the hook size right matters as much as picking the bead itself, because a mismatch throws off both the drift and the hookup ratio. Stick to 8mm beads on #6–#4 hooks and 10mm beads on #4–#2 hooks, and you'll avoid the wobbly, unnatural look that comes from a bead riding too loose or too tight on the shank. If you ever want the full breakdown across every size we carry, the bead size chart lays it all out at a glance.

Water Conditions and Egg Size Should Drive the Call

Let the water in front of you make the decision more than habit or whatever's already tied on. Clear, low, technical water usually rewards the smaller, subtler 8mm profile, while off-colour or faster water gives the 10mm size room to stand out without spooking fish. It's also worth thinking about what's actually spawning upstream — if you know the run is mostly smaller-bodied fish, sizing down to match those eggs is rarely a bad move.

Species Matters Too

Different species key in on different egg sizes, and your bead should follow that logic rather than fight it. Trout and resident char are often happy with an 8mm bead since it mirrors the smaller eggs they see most often, while steelhead and bigger predatory fish will frequently commit harder to a 10mm bead trailing behind spawning salmon. When in doubt, carrying both sizes in a few core colours — something like Gourd alongside a brighter roe tone — gives you the flexibility to adjust bead by bead as the day changes.

A Quick Way to Decide on the Water

If you're standing on the bank second-guessing yourself, default to 8mm in clear, pressured water and 10mm when there's colour, depth, or active salmon in the system. From there, watch how fish react on the first few drifts and adjust rather than sticking rigidly to one size all day. For a broader refresher on presenting beads correctly once you've settled on a size, our how-to guide on fishing soft beads covers pegging, depth, and drift. And if you'd rather just answer a few questions and let us point you to a size and colour, the bead match tool does exactly that. Orders over $75 ship free, so it's easy to grab both sizes and let the river tell you which one's working.

Common questions

Should I fish 8mm or 10mm beads in clear water?

Clear, low water generally calls for 8mm beads since the smaller profile is subtler and matches smaller eggs already in the system.

What hook size goes with a 10mm bead?

A 10mm bead pairs best with a #4–#2 hook to keep the drift balanced and natural.

Do steelhead prefer 8mm or 10mm beads?

Steelhead can take either, but many anglers size up to 10mm when fishing behind spawning salmon and size down to 8mm in clearer, pressured water.

Is one bead size better for salmon-heavy rivers?

On rivers with active salmon spawning, 10mm beads often match the larger eggs drifting through and hold up better in faster or off-colour water.

Ready to put this into practice? Browse our hand-poured soft beads in the shop — orders over $75 ship free across Canada and the US.