The Horsefield tortoise (also known as the Russian tortoise, Testudo horsfieldii) is a small, hardy tortoise species that makes a great pet thanks to its manageable size, gentle nature, and strong personality. But just how big do they get?
Here’s everything you need to know about their adult size, growth rate, and what affects how big they grow.
🐢 Average Size of a Horsefield Tortoise
- Adult length:
📏 13 to 20 cm (5 to 8 inches) - Adult weight:
⚖️ 700 grams to 1.5 kg (1.5 to 3.3 pounds)
✅ Females usually grow larger than males to support egg development.
✅ Males are smaller and often have longer tails and a concave plastron (bottom shell).
📈 Growth Timeline
| Age | Approx. Shell Length |
|---|---|
| Hatchling | 4–5 cm (1.5–2 in) |
| 1 year old | 6–8 cm (2.5–3 in) |
| 5 years old | 10–13 cm (4–5 in) |
| Adult (8–10 yrs) | 13–20 cm (5–8 in) |
Most Horsefield tortoises reach full adult size by 8–10 years old.
📌 What Affects Their Size?
Several factors influence how big a Horsefield tortoise will grow:
1. Genetics
Some grow naturally larger or smaller depending on their lineage.
2. Diet
A healthy, calcium-rich diet of leafy greens and weeds promotes steady growth.
3. UVB Lighting & Heating
Essential for vitamin D3 production and shell/bone development.
4. Enclosure Size
Tortoises that have space to roam tend to grow more naturally and stay healthy.
5. Hibernation
Annual hibernation is part of their natural life cycle and may slow growth slightly but supports long-term health.
🏡 How Much Space Do They Need?
Even though they’re small, Horsefield tortoises are very active.
- Indoor enclosure: Minimum 120 cm × 60 cm (4 ft × 2 ft)
- Outdoor pen: The bigger the better! Aim for at least 2 m²
FAQs
🐢 Is the Horsefield the smallest pet tortoise?
Not quite—the Egyptian tortoise is smaller, but Horsefields are among the smallest commonly kept tortoises.
🐢 Can they outgrow their enclosure?
Yes. It’s best to start with or upgrade to a large space as they grow.
🐢 Do they keep growing forever?
They grow rapidly in the first 5–10 years, then very slowly. They may continue to gain a little weight as they age.
🐢 How long do they live?
With proper care, Horsefield tortoises can live 40 to 60 years, sometimes even longer!
✅ Summary
| Trait | Horsefield Tortoise |
|---|---|
| Adult size | 13–20 cm (5–8 in) |
| Adult weight | 700 g – 1.5 kg |
| Growth period | 8–10 years |
| Lifespan | 40–60+ years |
| Enclosure size (min) | 120 × 60 cm indoors, larger outdoors |
Conclusion
Horsefield tortoises grow to around 13–20 cm (5–8 inches) long and weigh up to 1.5 kg. They’re small enough for most homes but active enough to need a spacious, stimulating environment. With the right care, they’ll thrive for decades—making them a long-term, rewarding pet for reptile lovers of all ages.
Also Check:
• How Big Do Hermann Tortoises Get?
• How Big Do Hermann Tortoises Grow?
• How Big Does a Bearded Dragon Grow?
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