29.9 centimeters is equal to 11.772 inches.
To provide comparisons to known objects of similar size:
1. A standard A4 size piece of paper is 21 cm x 29.7 cm, which is slightly smaller than 29.9 cm.
2. A standard ruler is usually 30 cm long, which is slightly longer than 29.9 cm.
3. The iPhone 8 Plus has a height of 15.8 cm, which is about half the size of 29.9 cm.
4. An average banana is around 20 cm in length, which is slightly shorter than 29.9 cm.
5. The average adult hand span is around 19 cm, which is slightly shorter than 29.9 cm.
6. An American football has a length of about 28 cm, which is slightly shorter than 29.9 cm.
7. The height of a regular soda can is approximately 12 cm, which is significantly shorter than 29.9 cm.