smb
Worth a lookShows a thin review moat (109 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Review moat
Great109.24avg incumbent reviews — the moat a new listing must climb
Avg price
Great$47.15avg listing price — sweet spot $15–$100
Price range
Great$10.66–$104.97cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Great53%top-5 brand share — no brand owns this niche
Competition
Good40%top-5 click share — leaders hold, buyers still browse
Growth
Good+35.2%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Returns
Okay3.8%return rate — above 5% kills the launch gate
Conversion
Okay2.3%search→purchase rate — share of searches ending in a sale
Market size
Bad$67K$67K/yr · 61K searches
According to Flapen's Amazon United States niche tracking, smb is a $67K/yr Amazon United States market (61K searches/yr). The top 5 brands hold 53% of demand. Demand peaks in Jul. Verdict: Worth a look — 56/100.
Data updated Jul 26, 2026 · scored weekly · How we score niches
smb market data
- Units sold / yr
- 2K–2K
- avg 0–100/product
- Revenue / yr
- $71K–$94K
- units × avg price
- Conversion rate
- 2.3%
- Avg BSR
- #199
- Page quality
- 0%
- Prime
- 96%
- Sponsored
- 93%
- Out of stock
- 0.8%
- Avg brand age
- 60 months
- Avg seller age
- 184 days
Competition & brand share
The top 5 products take 40% of clicks — established leaders, but buyers still shop beyond them.Brands
19 rising
Sellers
128
Top-5 brand share
53%
Top 20: 100%
Top-5 click share
40%
Top 20: 78%
Open market
38%
- Pecihiko12%
- Pluzluce11%
- LalaKoo10%
- Owekfifv10%
- XS Scuba10%
- Seafard10%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +35.2% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 1.8×
Top smb search terms
- smb scuba13K/yr
- surface marker buoy scuba11K/yr
- smb10K/yr
- dsmb7K/yr
- dsmb scuba6K/yr
- scuba smb6K/yr
- surface marker buoy5K/yr
- dive marker buoy3K/yr
Top smb products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
LalaKoo Diving Surface Marker Buoy Set SMB 5ft High Visibility Inflatable Scuba Signal Tube Safety Sausage with 100ft Diving Spool Reel and Clip
LalaKoo$48.654.6★57 rev
XS Scuba Quick Launch Marker Buoy - Orange
XS Scuba$104.974.9★123 rev
Pecihiko Surface Marker Buoy 4ft Scuba Diving Surface Marker Signal Tube with Reflective Strip and Plastic Clip (Orange)
Pecihiko$25.814.4★164 rev
Scuba Choice 4 Surface Marker Buoy Signal Tube Orange - Durable Nylon TPU Compact BCD Pocket Fit Easy Oral Inflator Diver Below Print with Plastic Clip for Diving Safety
Scuba Choice$24.154.6★639 rev
Surface Marker Buoy Scuba with Reel 5ft High Visibility Diving Open Bottom Signal Tube Safety Sausage with Pouch Bag 100ft ABS Dive Reel and Steel Double-Ended Bolt Snap (Hi-Vi Red)
Owekfifv$52.883.9★97 rev
Newest
by launch date
Pecihiko Surface Marker Buoy 5ft Scuba SMB High Visibility Open Bottom Dive Buoy with Oral Inflator OPV and Reflective Strip Inflatable Signal Tube Safety Sausage (Orange+Fluorescent Yellow)
Pecihiko$34.654 rev
Surface Marker Buoy Scuba Diving SMB Marker Buoy Safety Sausage for Scuba Diving SMB 5ft DSMB Diver Below Signal Tube with Metal Finger Spool 98ft Dive Reel 316 Double End Hook Whistle Bag (Pink)
sipantee$48.745 rev
Surface Marker Buoy Scuba Diving SMB Marker Buoy Safety Sausage for Scuba Diving SMB 5ft DSMB Diver Below Signal Tube with Metal Finger Spool 98ft Dive Reel 316 Double End Hook Whistle Bag (Orange)
sipantee$48.625 rev
JUSTOOP 5ft Surface Marker Buoy Set (SMB) Inflatable Scuba Signal Tube with Reflective Strip Scuba Diving Open Bottom Float for Underwater Diving Snorkeling with 100ft Diving Spool Reel and Clip
JUSTOOP$46.1111 rev
Villozxiny 4ft Surface Marker Buoy Hi-Vi Inflatable Scuba Signal Tube with Reflective Strip Scuba Diving Open Bottom Float (SMB) for Underwater Diving Snorkeling
Villozxiny$28.9013 rev
Trending
90-day click momentum
SCUBAPRO Surface Marker Buoy 210D Nylon Orange 4.5 ft
SCUBAPRO$84.013.9★
Lindy Marker Buoy for Fishing - Internal Ballast Weights and 60 ft of Rot-Proof Cord Hot Orange
Lindy$11.914.7★
Pecihiko Surface Marker Buoy 5ft Scuba SMB High Visibility Open Bottom Dive Buoy with Oral Inflator OPV and Reflective Strip Inflatable Signal Tube Safety Sausage (Orange+Fluorescent Yellow)
Pecihiko$34.655.0★
4ft Yellow Scuba Diving SMB Open Bottom Surface Marker Buoy with Safety Sausage with 49ft Alloy Dive Reel and Double-Ended Bolt Clip for Underwater Sports Blue
Seafard$46.304.4★
Surface Marker Buoy Scuba Diving SMB Marker Buoy Safety Sausage for Scuba Diving SMB 5ft DSMB Diver Below Signal Tube with Metal Finger Spool 98ft Dive Reel 316 Double End Hook Whistle Bag (Orange)
sipantee$48.624.5★
What buyers say about smb
What buyers praise and complain about, mined from review topics.What buyers love
“Very well made”
“Durable”
“Compact for safety”
“Exactly as advertised”
“Excellent price”
“The size is good and compact”
“Deflating is easy and dries quick”
“Worked perfectly”
“Materials appear sturdy”
“The bag is big enough that you wont have to struggle to put everything back into it after use”
What buyers complain about
“Cheap”
“Reel is a bit smaller than most reels”
“Second option is to orally inflate which I would not recommend”
“I read other reviews that this product was weak”
“All the stitches came undone”
“The line on the spool feels thin”
“value for the money is not there”
Top return reasons
Common questions
- Is smb profitable to sell on Amazon United States?
- The niche generates $67K/yr across 46 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is +35.2%. Flapen's verdict: Worth a look (56/100).
- How competitive is the smb niche?
- 19 brands and 128 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 53% of demand.
- What do buyers complain about in smb?
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Inflation/Deflation. The return rate is 3.8%.
- When does demand for smb peak?
- Demand peaks in Jul; the busiest month runs 1.8× the quietest.
- What does it cost to enter the smb niche?
- Listings span $10.66–$104.97; the average listing price is $47.15 (sweet spot $15–$100). The average incumbent carries 109 reviews — the moat a new listing must climb.