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exercise ball size chart

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A small market ($37K/yr) — this niche doesn't clear our bar today.

Market size 9Growth 20Conversion 37Competition 40Returns 47Price range 75Avg price 88Brand share 26Review moat 23Quality gap 47

Avg price

Great$20.02

avg listing price — sweet spot $15–$100

Price range

Great$10.63–$28.00

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Returns

Okay3.4%

return rate — above 6% kills the launch gate

Competition

Okay61%

top-5 click share — leaders hold, buyers still browse

Conversion

Okay2.9%

search→purchase rate — share of searches ending in a sale

Brand share

Okay89%

top-5 brand share — brands hold most of the demand

Review moat

Bad8,262.11

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-10.8%

90-day search growth — must beat 0% to launch

Market size

Bad$37K

$37K/yr · 63K searches

Competition

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 falling

Sellers

18

Top-5 brand share

89%

Open market

6%

  • Gaiam45%
  • APEXUP15%
  • Trideer11%
  • Fitvids10%
  • EVERICH TOY8%
  • ProBody Pilates5%
  • Open — no brand owns it (2 brands, 6%)

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$4K20%$7K30%$11K40%$15K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 18 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -10.8% search growth over the last 90 days.
3K2KPrime Day '25Spike '25Holiday '25SepDecMarJunAugNovMarMay

Peak months: Nov, Dec · busiest ÷ quietest = 2.4×

Reviews

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall20%

“Excellent product”

Inflation/Deflation9%

“Easy to inflate”

Advertised Vs Actual Product8%

“As advertised”

Value For Money8%

“Good value”

Exercise/Sports Suitability7%

“Great Exercise Ball”

Size-Overall5%

“Good size”

Ease Of Use5%

“Easy to use”

Durability5%

“It has held up”

Efficiency3%

“are functional”

Stretchability/Expandability/Elasticity3%

“great to use to stretch”

What buyers complain about

Inflation/Deflation16%

“Keeps deflating”

Size-Overall14%

“Big”

Durability13%

“Poor Durability”

Quality-Overall9%

“Cheap and trash”

Leak-Proof5%

“Leaks air”

Value For Money3%

“they are quite expensive”

Ease Of Use3%

“difficult to use”

Strength2%

“is not firm”

Product Condition2%

“Bought new received used”

Material Quality2%

“Thats got better materials”

Top return reasons

Size-Overall69%
Inflation/Deflation6%
Value For Money4%
Advertised Vs Actual Product3%
Functionality-Overall2%
Leak-Proof2%
Material Quality2%
Product Condition1%
Defective Material/Parts1%
Exercise/Sports Suitability1%