《10cm》的詞曲由日本歌手比良平姐妹演唱，其詞為白井良編劇，歌詞十分甜美。以下是其歌詞的英文版：
When I step on your feet
And you give me that look
That makes me realize
How small I am and worthless
It reminds me of why I should just run away
And when I fell apart
And I need your help to make me whole
It’s so good to see
The difference between you and all the rest
Cause every 10cm makes me feel more like me
Every inch that I grow
Is another step towards you
I don’t care if it’s wrong or right
Just give me a chance to prove my worth tonight
Every inch that I grow
Makes my heart beat faster
I don’t care if it’s right or wrong
Just give me a chance to prove my worth tonight
比良平姐妹的《10cm》是一首充滿少女感的歌曲，歌詞中描述了女生在男生面前感到自卑的樣子，以及女生慢慢長大的心境。女生每長10cm，就感覺更像自己，也更能接近男生，歌詞中充滿了愛的戰戰兢兢與羞澀感。而每一次的成長，都讓女生的心加速跳動，無論是對的錯的，只希望能夠得到男生的一點關注。這首歌非常適合在夜晚寂靜的時候聽，可以感受到女生在成長過程中的微妙情感。