What Size Should I Order For A Bubble Guppies Costume?

Costume sizing can be surprisingly tricky, so here's the practical guide I use when picking a 'Bubble Guppies' outfit for kids — peppered with what worked for my niece and a few things I learned the hard way. First off, never rely solely on the age label. Instead, grab a soft measuring tape and take these simple measurements: height (top of head to floor), chest (widest point, across the nipples), waist (natural waistline), and head circumference if there's a headpiece or hood. If the costume has legs, also note inseam or pant length; for shoes or booties, get actual foot length in centimeters or inches. Write those numbers down and compare them to the vendor's size chart — different brands mean wildly different fits, from snug lycra suits to roomy plush rompers.

When you find where your kid's measurements fall on a chart, follow a couple of rules I swear by: if they fall between two sizes, size up. Kids move, grow, and inevitably want to layer a sweatshirt under a costume if it’s cold. For toddlers and preschoolers, I usually allow an extra 1–2 inches (2.5–5 cm) in chest and waist and 1–3 inches in height so they can sit, bend, and wear a shirt underneath. For babies, an extra inch or two helps with diaper changes and comfort. If the costume is made of stretchy fabric like spandex or polyester, you can be slightly more conservative; if it’s a rigid foam or heavily embroidered polyester, give more room. Also check sleeve and crotch lengths — a costume that’s perfect across the chest can still be too short in the torso if it’s designed for a different body proportion.

Different styles change the rules a bit. If you’re buying a full-body jumpsuit or onesie inspired by 'Bubble Guppies', prioritize torso and inseam measurements; a tight crotch or short legs will be uncomfortable. If it’s a dress or tutu-style costume, chest and length are the big ones — add room for a leotard underneath in chilly weather. For costumes with attached shoes or booties, make sure footwear is roomy; those attached booties usually run small and aren’t suitable for walking far. Headpieces and masks require head circumference plus a check whether there’s adjustable elastic or Velcro. I also always read product reviews: other buyers often mention whether the costume runs large, small, or has weird proportions like a short torso or narrow shoulders.

A few safety and practical notes I always keep in mind: avoid costumes with loose beads, tiny plastic pieces, or long trailing parts that can be a trip hazard for little kids. Pick flame-resistant materials and double-check zipper quality because a stuck zipper on Halloween night is its own kind of tragedy. If you’re ordering online, check the return policy — some Halloween shops exclude returns, which matters if you guess wrong. Finally, a small tailoring tweak (shorten sleeves, add elastic) can make a so-so fit great, so don't toss the idea of a quick adjustment. My niece ended up in a slightly roomy 'Bubble Guppies' outfit that we cinched with a hidden elastic — she had full range to dance and splash during the party, and her smile said it all. Happy shopping and I hope your little guppy looks adorable and comfy!