18th Birthday Decorations For Girls Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
18th Birthday Decorations For Girls sales on Amazon US totaled 46,400 units in July 2026 (▲ 9.0% vs. the prior month), generating an estimated $418,504 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 75.4% of unit volume and 68.8% of revenue, while a typical listing is priced at $11.69. The keyword itself pulled 24,128 Amazon queries over the same period (▲ 1.2% MoM).
Zooming out to the 12-month window ending July 2026, the 18th birthday decorations for girls Top 50 moved 577,650 units and $5,146,135 in cumulative sales — an average of 48,138 units and $428,845 per month. Monthly throughput topped out at 59,250 units in February 2026 and dipped to 25,550 in May 2026, leaving the latest reading 0.4% higher than August 2025.
18th Birthday Decorations For Girls Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
46.4K
▲ 9.0% MoM
Monthly Revenue 2026/07
$418.5K
▲ 8.7% MoM
Top 10 Market Share 2026/07
75.4%
18th Birthday Decorations For Girls Market Share & Sales Concentration on Amazon US — July 2026
The most-sold 18th birthday decorations for girls listing on Amazon US in July 2026 is ASIN B08X6LYL5V (Brand: PHD CAKE), which sold 9,000 units at $5.98 apiece — equal to 19.4% of every unit tracked in this report and 1.5× the volume of the No. 2 listing.
The Top 10 ASINs account for 35,000 units and $287,840 in July 2026 — 75.4% of unit volume and 68.8% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for '18th Birthday Decorations For Girls' on Amazon
July 2026
Is 75.4% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B08X6LYL5V
PHD CAKE Gold Long Thin Metallic Birthday Candles, Cake Candles, Birthday Parties, Wedding Decorations, Party Candles, Cake Decorations
9K
▲ 12.5%vs. prior month
$53.5K
latest month
12-month trend
B0DLMWXT1Q
2 Pack Pink Party Decorations, 3.28 FT x 7.05 FT Pink Backdrop, Metallic Tinsel Backdrop Fringe Curtains Backdrop Curtains, Photo Backdrop Party Supplies Birthday Party Decorationsay Party Decorations
6K
▲ 20.0%vs. prior month
$35.9K
latest month
12-month trend
B0CZ918MZQ
Happy Birthday Party Decorations with Banner Balloons for Women | Happy Birthday Banner, Birthday Decor for Girls Women, Curtain Backdrop, Foil Heart Star Confetti Balloons, Hanging Swirls
5K
▲ 25.0%vs. prior month
$56.1K
latest month
12-month trend
B0C9HQSGN7
ANSOMO Sage Green Happy Birthday Party Decorations Retro Green Nude Ivory Dark Olive Kraft Paper Banner Balloons Neutral Rustic Boho Blush Safari Botanical Greenery Wild Décor Supplies Women Adults
3K
▲ 0.0%vs. prior month
$30K
latest month
12-month trend
B08MJ8SRHG
Pink Tinsel Curtain Party Backdrop - GREATRIL Foil Fringe Curtain Lilac Pink Party Streamers for Princess Theme Party Decorations - 2 Packs
3K
▼ 40.0%vs. prior month
$29.9K
latest month
12-month trend
B0BWRDZP16
2 Pack Rose Gold Backdrop Birthday Decorations Foil Curtain Bachelorette Party Decor Rose Gold Decor Party Streamers Groovy Birthday Decorations Backdrop
3K
▲ 50.0%vs. prior month
$17.1K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best 18th Birthday Decorations For Girls Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
PHD CAKE is the best-performing 18th birthday decorations for girls brand in July 2026, moving 9,000 units across 1 ASIN for 25.7% of Top 10 volume. ZATAYE follows with 6,000 units (17.1%), ahead of Lutoys on 5,000 units (14.3%).
Volume is spread across 10 brands, with the top three holding 57.1% between them. No single label controls the shelf, which usually leaves room for a well-differentiated listing to take share without outspending an incumbent. Average selling prices among the leaders run from $5.98 to $11.99, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
PHD CAKE
1 ASIN in Top 10
25.7%
Units
9K
Revenue
$53.5K
Avg. price
$5.98
B08X6LYL5V
$5.98·★4.8·6.8K revsPHD CAKE Gold Long Thin Metallic Birthday Candles, Cake Candles, Birthday Parties, Wedding Decorations, Party Candles, Cake Decorations
Units sold9K
ZATAYE
1 ASIN in Top 10
17.1%
Units
6K
Revenue
$35.9K
Avg. price
$5.98
B0DLMWXT1Q
$5.98·★4.5·5.8K revs2 Pack Pink Party Decorations, 3.28 FT x 7.05 FT Pink Backdrop, Metallic Tinsel Backdrop Fringe Curtains Backdrop Curtains, Photo Backdrop Party Supplies Birthday Party Decorationsay Party Decorations
Units sold6K
Lutoys
1 ASIN in Top 10
14.3%
Units
5K
Revenue
$56.1K
Avg. price
$11.99
B0CZ918MZQ
$11.99·★4.5·1.5K revsHappy Birthday Party Decorations with Banner Balloons for Women | Happy Birthday Banner, Birthday Decor for Girls Women, Curtain Backdrop, Foil Heart Star Confetti Balloons, Hanging Swirls
Units sold5K
Trending 18th Birthday Decorations For Girls Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B08R3HW6JM booked 1K units at $5.99, with ▲ 25.0% MoM change. On the growth side, B0C7H1LM3Q leads positive momentum with ▲ 200.0% MoM growth on 300 units, with B0CV5QJ5HX close behind at ▲ 100.0% MoM on 400 units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B08R3HW6JM
18th Birthday Candles,Gold Number 18 Cake Topper for Birthday Decorations Party Decoration
Price
$5.99
Rating
4.8
Reviews
832
Latest month sales
B0C7H1LM3Q
YeohJoy 18th Birthday Decorations for Girls Rose Gold | 18th Birthday Sash, Tiara, Cake Topper, Candles, Number Balloons, 18th Birthday Gifts for Girls, Rose Gold Party Supplies
Price
$9.99
Rating
4.4
Reviews
67
Latest month sales
B0CV5QJ5HX
18th Birthday Cake Decorations, 18th Birthday Candles Cake Numeral Candles and Glitter Happy 18th Birthday Cake Toppers Set for Birthday Party Supplies (Rose Gold)
Unlock to view ASIN details and product titles
Price
$6.99
Rating
4.7
Reviews
430
Latest month sales
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