AniMac Calf Jacket Size Guide

AniMac Calf Jacket Size Guide
All over the world people measure animals in different ways, along the back, around the chest and hind legs or by weight. 
We are based in the UK, but from New Zealand, where we measure all of our products along the back of the animal, neck to tail, then work out the correct conversion. If you get confused or have any questions about our sizing, please get in touch.

Animac Waterproof Super Calf Jackets

Produced to keep your newborn calves warm and dry. Calf Jackets support crucial weight gain, promote healthy immune systems and significant savings on feed & medication. 
Measurements are taken along the back, neck to tail. 
  • Small = 22"
  • Medium = 24"
  • Large = 28"
  • X Large = 32"

Calf Coat Sizing Guide by Breed, Weight & Age

Belgian Blue: Male calves average 47 kg (104 lbs), and females average 44 kg (97 lbs) at birth.

Holstein: Typically around 40 kg (88 lbs) at birth.

Jersey: Approximately 25–27 kg (55–60 lbs) at birth.

Guernsey: Around 29 kg (64 lbs) at birth.

Growth Considerations

Wagyu: Due to their smaller birth weight, Wagyu calves may remain in smaller coat sizes longer.

Belgian Blue: With higher birth weights, they may require larger coat sizes from birth.

Holstein: Rapid growth may necessitate upsizing coats within the first few weeks.

Recommendations

Measure: Always measure from the base of the neck to the top of the tail to ensure proper fit.

Monitor Growth: Regularly check calf size to adjust coat size as needed.

Breed Consideration: Understand breed-specific growth patterns for optimal sizing.

How Farmers Use Calf Coats

Calf coats are typically used for the first 4–8 weeks of a calf’s life — that’s when they’re most vulnerable to cold stress and need extra support. But some farmers keep coats on well beyond 8 weeks, especially during cold snaps or in harsh climates. As long as the fit is right, extended use can help calves stay healthier and grow better — so it really depends on the conditions and the farmer’s goals.

Since calves grow fast (really fast), farmers take a few different approaches:
Some invest in a range of sizes and switch coats as the calves grow.
But most choose to buy a slightly larger size from the start — giving the calf room to grow without needing to change coats.

Our best-selling sizes reflect that:

  • Holstein calves usually start in a 28" Large
  • Jersey calves do best in a 24" Medium
  • Wagyu (a smaller beef breed) often wear a 22" Small
  • Big breeds like Belgian Blue? They go straight to the 32" X-Large
  • For premature or weak calves, some farmers keep a few extra-small sizes (20", 22") on hand — those early days are critical, and warmth can make all the difference.

AniMac Waterproof Calf Jacket Size Guide

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