I have a 4 yr old; what size should I order?

I got a size small for my little guy who is 3 and it is alittle big, so I would say small.

Our son is 8 now. How big of a child would the medium fit, please?

Medium 7-8 26-27" 23-24" 25-27" 48-51" 48-60 lbs. Large 10-12 28-30" 24-25" 28-30" 54-58" 60-87 lbs. item is a 'jumpsuit'

Disguise Kids Transformers Optimus Prime Muscle Costume Child Optimus Cosplay

Description

💥 Transform into the ultimate Autobot hero and lead the charge in style!

EASY MAINTENANCE - Spot clean recommended to keep the costume looking fresh for every mission and party.
COMPLETE LEADER LOOK - Includes jumpsuit, shoulder armor, and character mask for full transformation into the Autobot leader.
DURABLE COMFORTABLE - Crafted from medium-weight polyester that balances durability with all-day wear comfort for active kids.
HEROIC MUSCLE DEFINITION - Padded arms and chest deliver an iconic Optimus Prime silhouette that commands attention.
OFFICIALLY LICENSED DESIGN - Authentic cartoon-inspired artwork ensures your child stands out as the true leader of the Autobots.

This officially licensed Kid's Transformers Optimus Prime Muscle Costume features a muscle-padded jumpsuit with attached shoulder pieces and a detailed character mask. Made from durable 100% polyester, it offers a comfortable fit for kids aged 4-6, perfect for Halloween, cosplay, or imaginative play. Designed by Disguise, a leader in licensed costumes, it combines authentic cartoon artwork with quality materials to make your child the star of any costume event.

Specifications

ASIN	B083TMWB69
Age Range Description	Little Kid
Apparel Fabric Stretch	No Stretch
Apparel Fabric Weight Class	Medium Weight
Best Sellers Rank	#38,486 in Toys & Games ( See Top 100 in Toys & Games ) #190 in Boys' Costumes #556 in Kids' Costumes
Brand Name	Disguise
Closure Type	Hook and Loop
Color	Optimus Prime
Costume Decade	1980s
Customer Reviews	4.7 out of 5 stars 2,405 Reviews
Fabric Type	100% Polyester
Fit Type	Loose
Fit to Size Sentiment	Positive
Garment Size Country	United States
Included Components	Jumpsuit with muscle torso and arms, attached shoulder pieces, and character mask.
Item Type Name	Costume
Item Weight	4 Ounces
Manufacturer	Disguise
Material	Polyester
Occasion	Cosplay, Costume Party, Dress Up, Halloween, Make Believe
Part Number	104919L
Pattern	Costumes
Product Care Instructions	Hand Wash Only
Shoulder to Bottom Hem Length	30 Centimeters
Size	Small (4-6)
Sleeve Length Description	Short Sleeve
Special Features	Costume
Special Sizes	Standard
Style Name	Optimus Prime
Style Number	104919L
Target Audience	Toys & Games
Theme	Movies
UPC	192995004818
Unit Count	1.00 Count
Warranty Description	No Warranty
character	Optimus Prime

Reviews

A**R

Nice costume

Looks nice, well made. Fits true to size. Velcro holds well. Material is a nice quality.

29.11.2025

L**S

Cute Costume

This was a gift for my grandson! He is so happy with his costume! The quality is great and true to size. So cute!

10.10.2025

T**A

Perfect gift & super fun!

I got this as a gift for my nephew & he absolutely loved it! The design looks amazing in person & the colors are super vibrant. It fits well and seems comfortable to wear. The mask is a little big but still works fine. Perfect for dress up or parties. Def a great gift idea, he was so happy!

3.05.2026

A**N

Worth the price

This costume was great quality and the sizing wasn't too tight or too big.

27.10.2025

E**O

Great costume, except…

Mask is hard to see out of. It’s cool that the eyes are green, but that’s what makes it difficult to see out of. The costume itself is great, but we will need to add velcro to the part that slips over the shins/knees as it slips down when my son is walking. Otherwise, great costume, just buy a separate mask!

17.10.2023

A**.

Perfect gift

Exactly what my Grandson wanted!!! Quality and durability was what I expected.

11.10.2025

R**K

Good quality

Exelent

23.12.2025

M**Y

Fits true to size!

Fits true to size! The mask fits great too I just didn’t have a pic with it.

15.12.2025

M**X

Das Kind ist glücklich 😊

Das kostüm ist in Ordnung, über den Preis kann man streiten... Aber das Kind ist glücklich und zufrieden und das ist die Hauptsache

13.02.2023

V**Y

OTTIMO RAPPORTO QUALITA' PREZZO

ottimo prodotto, buo9na manifattura, maschera inclusa, resistente. consigliato

8.05.2023

S**Y

Good quality

My son like, it fits him, he is 8 yrs old

21.02.2026

S**N

Bello....ma

Il costume è arrivato giusto. Tessuto leggero, ma nella parte superiore e sulle braccia è imbottito per fare i muscoli, a mio figlio è piaciuto tantissimo😁 la maschera ha necessità di altri nastri per poter stare su(parer mio). La pecca più grande, ma superabile è la taglia. Io ho preso la M perché mio figlio anche se 5anni è alto e ha il busto lungo. La taglia M per lui era anche troppo grande e ho dovuto cucire per accorciate.(punti larghi che col tempo si possono togliere e non si nota ) ... Ecco questo è il mio MA... In generale lo consiglio perché è un articolo che non si trova facilmente tra i costumi nei negozi e l'entusiasmo di mio figlio non ha prezzo😁

11.02.2023

A**R

Fantastic

Fantastic costume my son loved the mask and costume.it fitted perfect and had it on all day.

31.03.2023

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$131.78

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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The delivery time was excellent, and the packaging was secure.

2 months ago

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Disguise Kid's Transformers Optimus Prime Muscle Costume - Child Optimus Cosplay Outfit - Boys & Girls Transformers Costumes S

Description

Specifications

Reviews

Common Questions