NexGard Size Guide for Dogs | Weight Chart & Size Help

Choosing the correct NexGard size is an important part of using the product as directed. NexGard chewables are sized by your dog’s current body weight, and each pack is labelled with a weight range in kilograms (kg). If you prefer pounds (lb), the chart below includes approximate, rounded conversions.

If your dog is close to a weight boundary, follow the size printed on the pack and check with your veterinarian.

How NexGard sizing works

NexGard sizes are based on weight — not breed or age. Each size (colour) matches a specific weight range.

When choosing NexGard:

  • Weigh your dog as accurately as possible (recent weight is best)

  • Select the colour/size that matches your dog’s current weight

  • Use one size category per dog

  • Always follow the label directions on the packaging

  • If your dog gains or loses weight, review sizing again before your next order

NexGard weight chart (kg + lb)

Use the chart below to choose the correct NexGard size based on your dog’s weight.

Pack colour Dog weight (kg) Dog weight (lb, approx.) Shop by size
🟠 Orange 1.8–4.5 kg 4.0–10.0 lb Extra Small Dogs — Orange (/products/nexgard-extra-small-dogs-orange-4-10-lbs)
🔵 Blue 4.6–10.9 kg 10.1–24.0 lb Small Dogs — Blue (/products/nexgard-small-dogs-blue-10-24-lbs)
🟢 Green 11.0–27.2 kg 24.1–60.0 lb Medium Dogs — Green (/products/nexgard-medium-dogs-green-24-60-lbs)
🔴 Red 27.3–54.9 kg 60.1–121.0 lb Large Dogs — Red (/products/nexgard-large-dogs-red-60-121-lbs)

Browse the full range: 👉 Shop NexGard for Dogs (/collections/nexgard)

Quick kg ↔ lb conversions

If you want to double-check a weight:

  • lb = kg × 2.2046

  • kg = lb × 0.4536 (exact factor: 0.45359237)

Handy cues: 1 kg ≈ 2.2 lb • 5 kg ≈ 11 lb • 10 kg ≈ 22 lb

Quick reference chart (common weights)

kg lb (approx.)
2 4.4
4 8.8
5 11.0
10 22.0
15 33.1
20 44.1
25 55.1
30 66.1
40 88.2
50 110.2

When to review your dog’s NexGard size

You should re-check sizing:

  • If your dog gains or loses weight

  • As puppies grow into new weight categories

  • Before starting a new routine or reordering

Selecting the correct size helps ensure NexGard is used as directed.

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