SF Small Magnetic Fly Box Slim Floatable for Fly Fishing Super Thin Fishing Boxes Clear…
- Fly Box
- 1 pound
- Plastic
- 6
- More reviewed than 60%
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How it ranks among the 15 fly boxes we track
4.6★ across 471 Amazon ratings, Bayesian-smoothed toward the category average.
471 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 15 fly boxes we track - how the scorecard works · full fly boxes data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jul 5, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The SF fly box is a slim, magnetic six-compartment case built from ABS plastic for storing small flies, tying beads and hooks. At 3.43 x 5 x 0.59 inches it is sized to slide into a shirt pocket or chest pack rather than a full tackle box.
This is a box for small patterns rather than a general fly box. Multiple reviewers found it well suited to size 14 and smaller nymphs and midges, with the magnetic pads holding flies securely without preventing quick removal by hand. It is not built for bulkier hackled dry flies or larger streamers.
- Six magnetic compartments in a 3.43 x 5 x 0.59 inch case
- ABS plastic construction with high-density foam insert
- Snap-tight lid for secure closure
- Slim profile designed for pocket or chest-pack carry
Who it's for
Fits anglers who fish small nymphs, midges, or dry flies and want a slim box for a shirt pocket or chest pack. Anglers who mainly fish larger flies or hackled dries need a foam-insert box instead.
What buyers say
From Amazon customer reviews.
Owners consistently praise how thin and lightweight the box is for its capacity, and several say the magnets hold flies securely even with the case open in the wind. The main friction point is the snap latch, which a couple of reviewers found stiff to open, and more than one buyer noted it works better for small patterns than bulkier flies.
Strengths and trade-offs
Drawn from this product's published specifications.
- Genuinely thin, fits a shirt or chest pack pocket
- Magnetic compartments hold flies through normal handling
- Clear lid makes contents easy to see without opening
- Latch can be stiff to open at first
- Not suited to larger or hackled dry flies
- Sized for size 14 flies and smaller
Specifications
| Brand | SF |
|---|---|
| Model | FB0403 |
| Dimensions & fit | |
| Maximum Weight Recommendation | 1 pound |
| Item Dimensions L x W x H | 0.6 × 5 × 3.4 inches |
| Construction & materials | |
| Material Type | Plastic |
| Color | Clear |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Number of Compartments | 6 |
| Water Resistance Level | Not Water Resistant |
Other SF fly boxes
How it compares
This product against the closest alternatives we track in fly boxes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| SF Small Magnetic Fly Box Slim Floatable for Fly Fishing Super Thin Fishing Boxes Clear…This product | 4.6 / 5 | 471 | 4.2 / 5 |
| Gonex Fly Boxes for Fly Fishing Jig Boxes Two-Sided Waterproof Lightweight Fly Fishing…Gonex | 4.7 / 5 | 1,900 | 4.2 / 5 |
| Dr.Fish Fly Fishing BoxDr.Fish | 4.7 / 5 | 617 | 4.2 / 5 |
| Alichino small fly box for fly files ice jig box fly box for fly fishingAlichino | 4.7 / 5 | 594 | 4.2 / 5 |
| fishpond Tacky Original Fly Boxfishpond | 4.7 / 5 | 451 | 4.1 / 5 |
Similar fly boxes from other brands
Questions about the SF FB0403
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size flies fit the SF magnetic fly box?
Reviewers found it particularly suited to size 14 and smaller nymphs, midges and dry flies; larger or hackled patterns are a tighter fit.
Is the SF fly box waterproof?
One reviewer described it as reasonably waterproof, though this has not been tested to a specific rating.
How many compartments does the SF FB0403 fly box have?
It has six magnetic compartments sized for small flies and tying materials.