--- title: "Is King Box Spring 9 Inch Worth Selling on Amazon US?" canonical_url: "https://flapen.com/research/us/home-kitchen/king-box-spring-9-inch" last_updated: "2026-09-18T19:52:26.489Z" locale: en meta: description: "King Box Spring 9 Inch Amazon US estimated sales data: $30,900/month, -6.6% growth. Worth selling? See the verdict." "og:description": "King Box Spring 9 Inch Amazon US estimated sales data: $30,900/month, -6.6% growth. Worth selling? See the verdict." "og:title": "Is King Box Spring 9 Inch Worth Selling on Amazon US?" --- OverviewNichesProductsSearch terms Flapen Score ## King Box Spring 9 Inch against its category The dotted line is the Home & Kitchen average. Past it, King Box Spring 9 Inch is stronger. Inside it, weaker.Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality GapThis niche Category average [**See the method **](https://flapen.com/science) Market ## The King Box Spring 9 Inch market on Amazon at a glance Shoppers on Amazon United States searched for King Box Spring 9 Inch 84K times last year and spent an estimated $370K. The top 5 brands take 55% of clicks. Flapen scores it 52 out of 100, a Maybe. 01 · Demand ### An estimated 4.0% of those searches ended in a purchase. Shoppers searched for this 84K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 4.0% of those searches ended in a purchase. Searches in the last 90 days moved -6.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $370K a year.
Searches, last 12 months
84K
Growth, 90 days vs prior 90
-6.6%
Conversion, latest week
4.0%
Market size, estimated
$370Ka year
Peak month
March1.2× the quietest month
Top search term
king box spring 10 inch35K searches a year
02 · Price ### A sale here is worth $109.63. Listings sell for $109.63 on average, from $53.28 to $241.85. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 100 to 250 of them. At $109.63 that is $11K to $27K a year per listing.
Average price
$109.63above the $15 to $100 sweet spot
Price range
$53.28–$241.85
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
3K–4K
Units per listing a year
100–250
Revenue per listing a year
$11K–$27K
Returns
3.0%of orders · Amazon United States median 2.1%
03 · Entry bar ### The bar here is reviews. 88% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 1.4% of listings are out of stock. The average listing ranks #29 within Mattresses & Box Springs. It carries 3,673 reviews at 4.32 stars, so a new listing needs social proof before a better product.
Sponsored listings
88%
Prime listings
94%
Out of stock, average day
1.4%
Average rank
#29in Mattresses & Box Springs
Average rating
4.32 starsAmazon United States average 4.42 stars
Average reviews
3,673per listing
Listings tracked
33
04 · Newcomers ### 9 of last year's 13 launches cleared the first-year sales bar. 13 products launched here in the last 12 months. 9 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 25 months on average, so a newcomer is not facing entrenched names.
Launched, last 12 months
13
Successful launches
9Amazon's first-year sales bar
Average brand age
25 months
Products ## Top King Box Spring 9 Inch products & what they sell for Every tracked product: its share of the shelf, its reviews, and its price.**Sign in to see the products** The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone. [Sign in](https://flapen.com/auth/login) Competition ## Competition: brands, sellers & click share The top 5 products take 49% of clicks. Leaders hold, but buyers still shop past them. Brands**26 **▲rising Sellers**29** Top-5 brand share**55%** Top 20: 94% Top-5 click share**49%** Top 20: 85% Open market**40%**- Brand 119% - Brand 213% - Brand 39% - Brand 48% - Brand 57% - Brand 65% Demand ## King Box Spring 9 Inch search demand Weekly searches over the year, seasonality beneath. Pick a range.3M6M1YAll3K2KHoliday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay No pronounced peak months · busiest ÷ quietest = 1.2× Search terms ## Top King Box Spring 9 Inch search terms shoppers use The exact words shoppers type, with yearly volume, growth, and conversion.90D1Y - **king box spring 10 inch**35K/yr-5.1%3.3% conv. - **king box spring 9 inch**18K/yr-10.1%5.4% conv. - **king size box spring 9 inch**10K/yr+1.9%4.0% conv. - **9 inch box spring king**5K/yr-21.5%5.8% conv. - **king size box spring 12 inch**5K/yr-18.4%1.5% conv. - **king size box spring 10 inch**3K/yr+11.5%3.7% conv. - **box spring king 9 inch**3K/yr-4.8%6.6% conv. - **9 inch king box spring**3K/yr-8.1%6.0% conv. Reviews and returns ## What reviews say buyers love and hate about King Box Spring 9 Inch We read the reviews and the return reasons for every product selling here.**25%**of positive reviews mention “Comfort-Overall”**15%**of negative reviews mention “Thickness”**3.0%**of orders come back > **“Its thick” **_A buyer, on “Thickness”15% of negative reviews mention the same topic_ Every topic ### Every topic buyers talk about, one row each. Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote. 17 topics**Negative****Positive****Comfort-Overall**+2.254%25%6% of returns“Comfortable Comfortable Comfortable”**Assembly/Installation**+0.556%10%5% of returns“Easy to install”**Thickness**−0.1215%7% of returns“Its thick”**Value For Money**—5%7%“For the price”**Size-Overall**—5%7%29% of returns“True to size”**Quality-Overall**−0.026%6%“Good Quality”**Soft Feel**—9%2% of returns“softer than I expected”**Advertised Vs Actual Product**−0.046%2%9% of returns“False Advertising”**Fluffiness**−0.078%“Not as fluffy”**Sleep Quality**+0.645%“helps improve sleep quality”**Strength**+0.125%“Easy assembly & very sturdy”**Cushion**−0.045%3% of returns“Does not provide that much padding”**Durability**−0.034%“Not durable”**Foam**+0.404%“Excellent mattress pad it was so nice”**Height**—12% of returnsReturn reason only. No review mentions it.**Defective Material/Parts**—5% of returnsReturn reason only. No review mentions it.**Thin**—3% of returnsReturn reason only. No review mentions it.Expand all rows Keep looking ## Related niches Niches in the same category that score near this one. Research these next. [All Home & Kitchen niches](https://flapen.com/research/us/home-kitchen/niches) [

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