The Diameter of Holes in CDs

The diameter of holes in CDs is perfectly 15 mm.

This length is the same as the seven size of rings.

People seem to express it as "four" in the US, "H" in the UK, respectively.

If your girlfriend are putting a CD's hole on her finger and it looks just fit, you should remember it.

If you give a perfect size ring for your girlfriend, she must be surprised.

CD の穴の直径

CD の穴の直径は、15 mm です。

これは、指輪の7号のサイズと同じです。

アメリカでは 4、イギリスでは H と表すようです。

もしあなたの彼女が CD の穴に指をぴったりはめていたなら、それを覚えておきましょう。

ぴったりサイズの指輪をプレゼントすれば、きっと驚かれるはずです。

• The diameter of holes in CDs is perfectly 15 mm.
• The diameter of holes in CDs is exactly 15 mm.

• This length is the same as the seven size of rings.
• This sentence is perfect! No correction needed!

• People seem to express it as "four" in the US, "H" in the UK, respectively.
• It is expressed as "four" in the US and "H" in the UK, respectively.

• If your girlfriend are putting a CD's hole on her finger and it looks just fit, you should remember it.
• If your girlfriend puts a CD on her finger and it looks like it fits, you should remember it.

• If you give a perfect size ring for your girlfriend, she must be surprised.
• If you later gave a perfect size ring for your girlfriend, she would surely be surprised.

• The diameter of holes in CDs is perfectly 15 mm.
• The diameter of holes in CDs is perfectly exactly 15 mm.

  Use "exactly" when referring to a unit of measurement.

• This length is the same as the seven size of rings.
• This length is the same as the seven size of size seven rings.

• If you give a perfect size ring for your girlfriend, she must be surprised.
• If you give a perfectly sized ring for to your girlfriend, she must will be surprised.

  I how "perfectly sized" sounds.
  
  The word "must" here sounds like a rule is forcing her to be surprised for some reason. "Will" is more natural to show we think that this is how she will react.