Updated

I also wanted to keep them all in one post. I can combine shipping on anything to lower the cost a little. I'm also willing to consider any other offers.
Marlon Brand Leather
1" wide
9"-11"
$15 shipped in the US
Paco Collars "The Small Signature"
3/4" tapered to 1/2" at the buckle
9"-11"
$30 shipped in the US
Collar Mania Collars
#1 Laminated cotton colorful striped fabric
SOLD
#2 Green Heisenberg fabric
No buckle slide collar
Fits necks: 8"-12"
3/4" wide
$10 shipped in the US
It is used but still in new condition.
#3 Colorful Plaid fabric SALE PENDING!
No buckle slide
Fits necks 8" - 12"
3/4" wide
$10 shipped in the US
Also used but in new condition.
#4 Little Monsters on Orange fabric
SOLD
Collar Mania Bling Collar
3/4" wide
10"-13"
Metal quick release buckle
Not lined
$10 shipped in the US
This photo does not do this collar justice. It is a nice bright green color. Not dark like it appears.
Collar Mania
Pink Camo Minky
1" wide
No buckle slide
pink satin lining
8"-12"
$15 shipped in the US
Stillwater Kennel Supply
1.5" Leather with deerskin lining
15"-22" according to the website
$25 shipped in the US
This is a massive collar! Very thick and will absolutely outlast any dog you put it on. It's so bulky and thick that my dog with an 18" neck wears it on the last hole. It's easier for me to buckle and unbuckle it that way. As you can see in the one picture, Em scratches a lot and has ripped the outer layer of the deerskin. It hasn't ripped all the way through though. If you put that side on the bottom like I do, you cannot see the rips at all while the dog is wearing it.
Bottom view
Top view