Thundershirt's patent-pending design applies a gentle, constant pressure that has a dramatic calming effect for most dogs. Scroll to bottom of page for specifics on sizing, embroidery and product details.

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Because embroidery is customized we do not offer money back guarantee, returns or exchanges on these products

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For selecting the correct size, your dog's chest size is the best measurement to use. If not available, your dog's weight may be used as a guideline.

Size Chest Size Weight
XXS 9"-13.5" < 12 lbs.
XS 13"-18" 10-18 lbs.
S 16"-23" 15-25 lbs.
M 18"-26" 20-50 lbs.
L 24"-32" 40-65 lbs.
XL 31"-40" 65-110 lbs.
XXL 38"-50" > 110 lbs.

Measure “Chest Size” as illustrated by red arrow below

sizing chart

Thundershirt features:

  • Drug-free and completely safe.
  • Soft, breathable, washable fabric.
  • Patent-pending design makes Thundershirt very easy to put on and to take off.
  • Embroidery available in orange lettering for all Thundershirts. Maximum of 15 characters.
  • Standard shipping costs are $5.95 for US Postal Service for first Thundershirt and $2.50 for each additional Thundershirt.
  • Express Shipping and International shipping options are available and pricing will be calculated upon checkout.  

This item will usually ship within two business days.