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? -
![Amazon.com: xinchuangya 50 Pack 3'' 8cm White Surface Printable Mini Recordable Blank DVD-R Discs Disk for DVD VCR Video Camera 1.4GB/30min 1-8X (WS5201) : Electronics Amazon.com: xinchuangya 50 Pack 3'' 8cm White Surface Printable Mini Recordable Blank DVD-R Discs Disk for DVD VCR Video Camera 1.4GB/30min 1-8X (WS5201) : Electronics](https://m.media-amazon.com/images/I/51HuVQibcTL._AC_UF894,1000_QL80_.jpg)
Amazon.com: xinchuangya 50 Pack 3'' 8cm White Surface Printable Mini Recordable Blank DVD-R Discs Disk for DVD VCR Video Camera 1.4GB/30min 1-8X (WS5201) : Electronics
![Amazon.com: 50 Clear CPP Plastic DVD Sleeves with Flap for 14mm DVD Box Awork & 2 disc Non-Woven sleeves By StarTechDeals : Home & Kitchen Amazon.com: 50 Clear CPP Plastic DVD Sleeves with Flap for 14mm DVD Box Awork & 2 disc Non-Woven sleeves By StarTechDeals : Home & Kitchen](https://m.media-amazon.com/images/I/81md9sP61wL.jpg)