Here’s a detailed breakdown of hamster body size data (focusing on common pet breeds):
🐹 Size Comparison of Major Breeds
Syrian Hamster (Golden Hamster)
- Body Length: 12–20 cm (females are typically 1–2 cm longer than males).
- Weight: 100–200 g (reaches adult size 8 weeks after birth).

Dwarf Hamsters
- Winter White / Purple Hamster: 8–11 cm.
- Roborovski Hamster: 5–7 cm (the smallest pet hamster species).
European Black-Bellied Hamster
- Body length can reach 20–34 cm (a non-mainstream pet breed).
📏 Measurement Tips
- Measure from the nose tip to the base of the tail (excluding the tail).
- Adulthood Criteria: Syrian hamsters stop growing after 8 weeks of age.
🌟 Exceptional Cases
- Some domestically bred Golden Hamsters can reach 22 cm with special genetics and optimal care.