For The Humans:

 Stickers: 

3x3 inches.

Durable and weatherproof.

 Price: 

$5

 For Your Hair: 

 Scrunchies: 

Standard scrunchie style.

 Price: 

$8

 For Your Keys: 

 Key Chain: 

1" wide x 4" long. 

 Price: 

$8

 Lanyards: 

1" wide x 18" (36" total loop) 

 Price: 

$13