It's Your Birthday Dog Pajamas
Jax & Molly's It's Your Birthday dog pajamas are the perfect outfit to celebrate your fur-baby's birthday or gotcha day! You will love the pajama's vivid colors and appreciate the purposeful, easy-to-dress pullover design. Your pup will enjoy the comfortability of the lightweight polyspandex material. Match these fun pajamas with your choice of white, fuchsia, or royal blue trim. Your pup will go from regular cute to super-duper adorable in under 30 seconds! (Colors may appear slightly different on different digital screens than in person.)
The Muscle Tank style has larger arm holes and comes with a waist band. Our Classic T is our original style and is waist band free.
- FREE U.S. SHIPPING ON $100+ ORDERS
- High-quality, lightweight, polyspandex.
- 4-way stretch.
- Machine wash cold.
- Tumble dry low.
- No iron. Easy peasy!
Measuring a wiggly dog for a pullover can be challenging but don't worry. Here are some helpful tips!
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Simplify with plenty of treats and an extra pair of hands.
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Ask the helper to be the designated treat supplier.
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While your dog is standing use the measuring tape to measure the widest part of the chest and neck girth.
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For the back length, measure from the center of the shoulder blades to the base of the tail.
Voila! You easily measured the chest, neck and back.

SWEATERS & PAJAMAS | CHEST GIRTH | BODY LENGTH | NECK GIRTH |
XXXS | 13-14" | 10" | 8" |
XXS | 16" | 12" | 10" |
XS | 19" | 14" | 12" |
S | 22" | 16" | 14" |
M | 24-25" | 18" | 16" |
L | 28" | 22" | 18" |
XL | 31" | 23" | 20" |
2XL | 33" | 24" | 22" |
3XL | 35-36" | 29" | 22-25" |
4XL | 39-40" | 33" | 22-25" |
All items are made uniquely for your pup. All sales are final sale. Please be sure to take proper measurements and use our how-to-measure diagram.