Comic Book Storage Guide

How many bags, boards and boxes do I need?

Enter how many comics you have of each size. The calculator shows how many bags and boards you need (one of each per comic) and how many short or long boxes, with Amazon search links for each item. It uses the low end of the manufacturer’s box capacities so you are never left short.

Golden Age comics are larger, and box capacity for them is not standardized, so the calculator gives bags and boards but not a box count for them.

What actually damages comics

Most long-term damage comes from five things: acid from low-quality paper and packaging, humidity that causes mold and warping, light that fades ink and yellows paper, pressure that bends spines and corners, and pests that eat paper and glue. Good storage is about controlling those five consistently, not about one perfect product.

A high-end box does little if the room it sits in swings between a damp summer and an overheated winter.

Bags and boards, the basic unit

Comic bags are usually polypropylene or polyethylene. Polypropylene is generally clearer and considered more stable, and polyethylene is more flexible and often cheaper. A backing board, usually acid-free, goes inside the bag behind the comic so it cannot bend.

Sizes differ by era. Sellers list current-size bags at about 6 7/8 inches wide and silver-size at about 7 1/8 inches, and Golden Age bags are wider, with sellers giving widths from about 7 5/8 to 7 3/4 inches. Sizes vary by seller, so measure a comic before you buy a large pack. Do not tape a bag tightly shut against the comic for long-term storage.

Bags and boards do not need frequent replacing, but boards can absorb moisture in poor conditions, and bags can yellow or turn brittle with age. Check older stored comics once or twice a year, and swap any bag or board that looks stained or feels damp.

Short boxes and long boxes

A short box holds roughly 150 to 175 bagged and boarded current or silver comics. A long box holds roughly 250 to 300 of them. Short boxes are easier to carry when full, and long boxes get heavy quickly, which matters if you will be moving them.

Acid-free cardboard boxes are the standard for a reason: ordinary cardboard can release acidic compounds over years that move into the paper stored inside. Acid-free dividers help separate titles and mean you handle fewer books while searching.

The room matters more than the box

Basements and attics are where collections are most often damaged, because basements bring damp and attics bring heat. A stable, moderate room with humidity that is neither very dry nor very damp is the usual advice. A cheap hygrometer will tell you what your storage space really does over time.

Direct sunlight through a window quickly fades and yellows covers. Keep boxes away from windows, and raise them off the floor to protect against minor flooding or a leaking pipe.

Slabbed comics and oversized books

Graded, slabbed comics are protected by their case, but they still benefit from stable temperature and humidity, and they are best stored upright, not flat. Treasury editions, graphic novels and omnibuses do not fit standard bags or boxes, so store them upright on a shelf, away from direct light, as you would hardcover books.

Handling comics without damage

Clean, dry hands are the simplest step. Skin oils transfer to paper over repeated handling, which is why some collectors use cotton gloves for valuable books, though many prefer washing and drying their hands. Slide a comic out of its bag by holding the bag, not by pinching the edge of the book.

Keep reading copies separate from the ones you want to preserve, so the books you love to reread do not wear down the ones you are saving.

Cataloging and insurance

A spreadsheet or a collection app that records title, issue and condition makes it easy to know what you own without unpacking boxes. Photographs of covers and any condition problems help track changes, and they help with insurance. Standard home insurance often covers collectibles only up to a modest limit, so ask your insurer if your collection has real value.

Keep a copy of the catalog and photos somewhere other than the collection itself, such as a cloud backup, in case of fire, flood or theft.

Moving a collection

Boxes get heavy fast, especially full long boxes, so check the weight before you lift. Keep boxes upright, never on their side, and do not stack them more than a few high, because the weight crushes the comics at the bottom. If a collection must sit in a truck or storage unit, even briefly, check that the space is climate controlled.

Thinking of selling instead? Our value guide shows how to check what a comic is worth first.

A simple starting checklist

Use this as a short list.

• Bag and board each comic, in the right size for its era.
• Use acid-free short or long boxes, not generic cardboard.
• Keep boxes in a room with moderate, stable temperature and humidity: not an attic or basement.
• Keep boxes and shelves out of direct sunlight, and off the floor.
• Store slabbed comics upright, and graphic novels and omnibuses on a shelf.

Related guides

• Comic Book Price and Value Guide
• Best Comic Books of All Time
• How to Start Reading Comics
• Where to sell comic books
• Omnibus vs trade paperback