Finding the Right Bag for Oversized Music Scores

A recent member in a Facebook group asked for recommendations for the best case to carry (and protect) oversized band scores. Here are a few recommendations for Wind Conductors to consider.
All of these items are available on Amazon:
A3 Art Portfolio Carry Case Bag
FEATURES:
Large capacity bag made from waterproof material
Multi-function - 3 pockets
Main Pocket Dimensions: 18.9ā x 14.2ā
2 Exterior Pockets: 11āx4.3āā & 11āx11ā
2 Back-pack straps for easy carrying
Available in Black, Blue, Coffee, Purple, Pink and moreā¦
COST: $30.99
G-FAVOR 40L Travel Back pack, Vintage Canvas Rucksack Convertible Duffel Bag Carry On Backpack
FEATURES:
Large Capacity: The size of the canvas travel backpack is 20.1 x 12.5 x 7.9 inches.
Multi-pocket Design: The travel backpack has a main pocket, a 17.3 inch laptop compartment and separate pockets
Wear-resistant and Durable
Front Compartment: For cellphone, passport, pen, keys, wallet, cards, purse, glasses and other small items.
Side Pocket: Durable Elasticized Mesh Pockets, fit water bottle, small compact umbrella or other items.
Available in Black, Blue, Coffee, Floral, and Khaki
COST: $59.99 - $63.99
Transon Art Portfolio Case Artist Backpack Canvas Bag Large 26ā x 19.5ā *
FEATURES:
Heavy duty artist portfolio bag - made of durable canvas, multi-function storage pockets
Main bag can fit in size 18āx24ā
1 long easel pocket approx 23ālong (Can easily hold baton case)
1 small pouch, 1 large pouch, 1 mesh pocket.
Design can be used as tote or backpack
Available in Black, Blue, Coffee, Floral, and Khaki
COST: $24.90
Art Portfolio Case 19 X 25 Portfolio With Backpack & Tote Bag*
FEATURES:
Portfolio Case 18 x 24 With Fabric backpack-style shoulder straps
Main Pocket Dimensions: 18ā x 24ā
4 Exterior pockets:
11x4 - Small accessories (pencils, highlighters, etc.)
11x17 - Note pads & Smaller scores
6x22 - Can easily hold a baton case
Available in Black, Blue, Gray, & Pink
COST: $21.59
* This is case may be too large for some people