What color sweater does Simon wear?

Simon wears a bright royal blue sweater or sweatshirt, which contrasts with Alvin's red and Theodore's green.

Does Simon have a letter on his sweater?

In the classic animated series, Simon's blue sweater is plain. However, some modern adaptations and merchandise feature a yellow 'S' on the front. You can choose either style!

How do I make a quick DIY Simon costume?

All you need is a blue sweatshirt, a pair of round black glasses, and a brown headband. You can make the ears out of brown construction paper or felt in just a few minutes.

AI-generated example

Simon Costume

Channel the smartest, tallest, and most studious chipmunk brother this Halloween.

Simon Seville is the brainy, tall, and highly sensible middle brother of the world-famous singing group Alvin and the Chipmunks. Known for his signature blue outfit and round black glasses, he is a popular choice for easy solo, couples, or group costumes. This look consists of a simple oversized blue sweater, round frames, and cute chipmunk ears.

Difficulty: Easy
Time: ~20 min
Budget: $25–60

See yourself as Simon →What you need Buy the Simon costume

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See yourself as Simon

One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.

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One render, $1. No account needed — if it fails you're not charged. Pricing.

Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.

Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.

Simon costume — Example look · AI-generated

You as Simon

Result

What you need for a Simon costume

Short on time? Buy it ready-made

Spirit Halloween sells the complete Simon costume — one box instead of 4 pieces.

Shop Simon at Spirit ↗

Oversized blue sweater
A royal blue long-sleeve crewneck sweatshirt or knit sweater, sized up for an oversized look.
DIY: Use a plain blue crewneck sweatshirt and paint a yellow letter 'S' on the front if you want to blend the cartoon and CGI styles.
Amazon
Round black glasses
Thick, round black-rimmed glasses frames without lenses.
DIY: Pop the lenses out of a cheap pair of round sunglasses, or use black pipe cleaners to twist into round frames.
Amazon
Chipmunk ears and tail set
A brown plush headband with rounded chipmunk ears and a matching clip-on tail.
DIY: Cut ear shapes out of brown and pink felt, glue them to a brown headband, and use brown faux fur or yarn for a tail.
Amazon
Brown leggings or pants
Simple dark brown leggings, sweatpants, or trousers to represent the chipmunk fur.
DIY: Use any dark brown or tan pants you already own.
Amazon

Rather not assemble it? See ready-made Simon costumes at Spirit Halloween ↗

How to put it together

1
Put on the dark brown leggings or pants to serve as the base chipmunk fur.
2
Pull on the oversized royal blue crewneck sweatshirt, letting it hang loosely.
3
Clip the brown plush chipmunk tail to the back waistband of your pants.
4
Place the brown chipmunk ear headband securely on your head.
5
Put on the round, thick-rimmed black glasses.
6
Optionally, use makeup to draw a small chipmunk nose and whiskers.

Makeup & hair

Keep hair neat and simple, tucked behind the ears. Use a brown eyeliner pencil to draw a small, rounded triangular nose on the tip of your nose, and add three small whisker dots on each cheek.

Simon for couples, groups, kids & more

couples: Pair up with Jeanette from the Chipettes, who wears a matching purple outfit and glasses.
group: Go as the full trio with Alvin (red sweater with a yellow 'A') and Theodore (green sweater).
kids: Use a blue fleece hoodie and felt ears sewn directly onto the hood for a cozy, warm kid-friendly version.
Plus size: Choose an ultra-soft, oversized royal blue tunic sweatshirt or fleece pullover for a comfortable, relaxed fit.
pet: A small blue dog sweater paired with a lightweight brown headband.

Tips

For group photos, make sure Simon stands in the middle or back, as he is canonically the tallest of the three brothers.
If you are wearing this to an outdoor event, the oversized sweatshirt allows you to easily layer warm clothes underneath.
Keep the glasses lens-free so they do not fog up or catch glare in flash photography.

Simon costume FAQ

What color sweater does Simon wear?: Simon wears a bright royal blue sweater or sweatshirt, which contrasts with Alvin's red and Theodore's green.
Does Simon have a letter on his sweater?: In the classic animated series, Simon's blue sweater is plain. However, some modern adaptations and merchandise feature a yellow 'S' on the front. You can choose either style!
How do I make a quick DIY Simon costume?: All you need is a blue sweatshirt, a pair of round black glasses, and a brown headband. You can make the ears out of brown construction paper or felt in just a few minutes.

Did you know? Simon is named after Simon Waronker, the co-founder of Liberty Records, the label that released the original novelty Chipmunks records in 1958.