What is the difference between CDs and DVDs in terms of size? Why do CDs and DVDs fit into each other but not into PCs, which have bigger holes for them? -
![Wholesale 10 Discs Grade A 4.7 Gb 16x Blue Blank Printed Dvd+r Disc - Blank Records & Tapes - AliExpress Wholesale 10 Discs Grade A 4.7 Gb 16x Blue Blank Printed Dvd+r Disc - Blank Records & Tapes - AliExpress](https://ae01.alicdn.com/kf/HTB11LfmQVXXXXXcaXXXq6xXFXXXb/Wholesale-10-Pcs-Grade-A-4-7-GB-16x-Blue-Blank-Printed-DVD-R-Disc.jpg)
Wholesale 10 Discs Grade A 4.7 Gb 16x Blue Blank Printed Dvd+r Disc - Blank Records & Tapes - AliExpress
![Amazon.com: Fasmov 1,000 Pieces White Paper CD DVD Sleeves Envelope Holder with Clear Window and Flap : Home & Kitchen Amazon.com: Fasmov 1,000 Pieces White Paper CD DVD Sleeves Envelope Holder with Clear Window and Flap : Home & Kitchen](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/514r4Chs01L.jpg)
Amazon.com: Fasmov 1,000 Pieces White Paper CD DVD Sleeves Envelope Holder with Clear Window and Flap : Home & Kitchen
![200min 8.5 Gb Dvd Disc White Inkjet Printable Dl Dvd+r Dvd - Buy Dvd,Dvd+r Pritable Dvd,Dvdr 8.5gb 8x Product on Alibaba.com 200min 8.5 Gb Dvd Disc White Inkjet Printable Dl Dvd+r Dvd - Buy Dvd,Dvd+r Pritable Dvd,Dvdr 8.5gb 8x Product on Alibaba.com](https://sc02.alicdn.com/kf/HTB1kR7jaAfb_uJkHFJHq6z4vFXaj/200325155/HTB1kR7jaAfb_uJkHFJHq6z4vFXaj.jpg)