noun
small packet (Japan Post international mail service for packages under 2 kg)
A specific Japan Post international mailing category for small packages weighing less than 2 kg.
海外に本を送るなら、小形包装物が安くて便利です。
If you're sending books overseas, the small packet service is cheap and convenient.
Compound of 小形 (small size) + 包装物 (wrapped item), a descriptive term for a Japan Post international mail category.