Characteristics
Upper material:EVA
Fastener type:Zipper
Question and answer: 
1)Q: Do these fit corded ear buds?
A: yes,  these case can fit for corded ear buds
2)Q: Can you fit and iphone charger and earbuds?
A: If you mean a charging cable,  the answer is yes.
Just remember to coil pretty tight,  and it should be fine.
3)Q: Are these cases waterproof?
A: No,  I do not think so. They‘re made of a foamy material that could maybe repel a little water if spilled but by no means is waterproof. Water would likely  leak through the zipper and/or seams.
Features:
1)Portable size:   save space and reduce clutter for your bag,  Lightweight and compact
2)Internal mesh:  The internal mesh keeps your headphones in place, so headphones don't unravel when you open the case
3)Wide using:  Case is sturdy which are good for organizing headphones and keeping earphone, earbuds,  USB cable and other accessories safe
4)Great Protection Performance:  High qualtiy Zipper EVA hard case,  PU leather appearance protection+ Inside soft velvet cloth protection,  dustproof,  anti-drop,  easy to clean
5) Multi-color Design: Different 5 color design makes this earphone case bag more beautiful and colorful, Multi-colored products make it easier for you to find and differentiate.
Description:   
Material:  EVA
Closure type:  zipper
Color:  Black, Pink, Purple, Red, Sky Blue
Size:  11cm x 8cm x 4cm
Package include:  1 x earphone box