Find the perfect duo costumes for your little one with iconic Seuss-inspired “Thing 1” and “Thing 2” outfits. This guide highlights the top baby-friendly options, including cozy velour jumpsuits and easy-to-wear bodysuits, plus a few fun iron-on patches to customize your set. Each product is chosen to balance comfort, fit, and authentic Seussian style for infants and toddlers. Browse practical one-piece costumes ideal for photos, Halloween, or playful pretend time.
| Product | Age Range | Why It Stands Out |
|---|---|---|
| Dr. Seuss Thing 1 & Thing 2 Onesie Costume | 12/18 Months | Soft velour, easy snaps for quick changes |
| Dr. Seuss Thing 1 & Thing 2 Deluxe Costume (Toddler) | 18 Months – 4T | Velour jumpsuit with back fastener, detailed accessories |
| Thing 1 & 2 Toddler Costume (2T/4T) | 2T – 4T | Velour/felt mix with secure back fastener |
| Thing 1 & 2 Iron-On Patch Set (Small) | Standard Size | Easy to customize existing outfits with bold numbers |
| Thing 1 & 2 Iron-On Patch Set (Large) | Standard Size | Large patches for prominent Seussian branding |
These selections cover infants to preschoolers, offering both convenient one-piece options and patch-ready accessories for DIY outfits. All items emphasize kid-friendly fabrics and kid-safe fasteners to keep dressing simple for parents and comfortable for little ones.
Dr. Seuss Thing 1 & Thing 2 Onesie Costume

Product features: Size: 12/18 Months, 100% polyester velour fabric offers a soft feel, and the jumpsuit includes snaps along inseams for easy on-and-off over the head. The design mirrors classic Thing 1 and Thing 2 styling, making it a convenient head-to-toe option for infants while maintaining Seussian charm. Suitable for photoshoots, Halloween, or dress-up playtime. The snug velour fabric helps keep little movers comfy during adventures.
Thing 1 & Thing 2 Deluxe Toddler Costume

Product features: Size: 4T, crafted from 100% polyester velour with felt accents and long-pile faux fur. The velour jumpsuit fastens with hook-and-loop at the center back for a secure fit. Thoughtful detailing captures the playful essence of Thing 1 and Thing 2, suitable for toddlers who want a standout look without complicated clothing layers. The deluxe design prioritizes comfort for longer wear during events or parties.
Dr. Seuss Thing 1 And Thing 2 Costume For Toddlers

Product features: Size: X-Small (2T – 4T), 100% polyester velour with felt and synthetic hair accents. Red velour jumpsuit fastens securely at the center back with Hook and Loop fastener. This outfit is designed for easy dressing and vibrant color, making it ideal for family photos, Halloween nights, or festive pretend play. The combination of plush fabric and durable fasteners supports active toddlers during celebrations.
Thing 1 2 Small Iron-On Patch Set

Product features: Includes two white numbered patches with black lettering. Each patch measures about 5.31 inches in diameter, designed to iron onto shirts or other items. These patches provide bold, vivid display of Thing 1 and Thing 2 in a classic Seussian style, offering a customizable option for DIY costumes and coordinating outfits for siblings or family photoshoots.
Thing 1 2 Large Iron-On Patch Set

Product features: This set includes two white patches with bold black lettering and larger diameter, around 7.16 inches, ideal for larger canvas items. The patches offer a bold Seussian look that stands out on shirts, jackets, or blankets. They’re suitable for adding theme to DIY costumes or coordinating outfits for both Thing 1 and Thing 2 siblings or friends in a group costume.
Tcombo Twin 1 & Twin 2 Bodysuit 2 Pack

Product features: 100% combed ringspun cotton (Light Gray/White blend), reinforced 3-snap closure for easy changes, flatlock seams for comfort. While not a dedicated Thing 1/Thing 2 set, the red-toned design roots well in the color scheme and provides a snug bodysuit base for sibling costumes or quick-match outfits for twins. It’s a practical option when building a unified look across two babies or toddlers.
SUEOSU Dog Shirts For Pet Clothes

Product features: Outdoor activity-friendly pet shirt with print featuring Thing 1 to Thing 9 theme. While designed for pets, it demonstrates how to extend the Seuss-inspired theme to family pets for coordinated group costumes or photos with your little one sporting Thing 1 or Thing 2 apparel. It provides a sense of multi-person, multi-pet cosplay continuity, ideal for family-style Halloween outfits or themed portraits.
Buying Guide
Key considerations when selecting Thing 1 and Thing 2 costumes for babies and toddlers:
- Comfort over fashion: Choose soft fabrics like velour or cotton blends with gentle fasteners to reduce fuss during dressing and wear all day.
- Fit and size range: Look for age-appropriate options from infant sizes to 4T to accommodate growth and ensure proper coverage for photos and events.
- Ease of dressing: One-piece jumpsuits with center-back or side closures simplify dressing, while snap-button interfaces aid quick diaper changes.
- Durability: Reusable costumes with sturdy stitching and secure patches are better for multiple wearings and future siblings or gifts.
- Accessories strategy: Iron-on patches are easy add-ons for DIY customization, but ensure fabrics can support ironing without damage.
- Safety considerations: Ensure no small detachable parts and that the costume materials are flame-resistant or flame-retardant as per local guidelines.
- Coordination potential: If dressing siblings, pair a full costume with patches or color-matching pieces to create a cohesive family look.
Comparison at a glance:
- One-piece costumes (infant/toddler): Quick to put on, great for photos and events, high comfort with velour fabrics.
- Patch sets: Ideal for customization of existing outfits, cost-saving, and flexibility for different themes beyond Thing 1 and Thing 2.
- Bodysuits: Durable and adjustable options, suitable for twins or group costumes when paired with shared color schemes.
Overall, the best baby and toddler Thing 1 and Thing 2 costumes combine comfort, ease of use, and the classic Seuss look. Whether you prefer a ready-to-wear jumpsuit or a DIY patch-based approach, there are options to fit infants and preschoolers while keeping the iconic red and blue theme intact for memorable pictures and playful celebrations.