Every Fortune Cookie top is sized to leave one inch of bag on each side of your fore-end — that inch is what forms the resting channel that locks your rifle down. Which gives you the whole answer in one line:
Bag top width − 2″ = the widest fore-end it runs.
Measure across the flat of your fore-end and read the table.
| Micro | MicroX | Mini | MiniX | Max | MaxX | |
| Top width | 4″ | 5.5″ | 5″ | 6.5″ | 6″ | 7.5″ |
| Runs fore-ends up to | 2″ | 3.5″ | 3″ | 4.5″ | 4″ | 5.5″ |
Conventional stocks and slim fore-ends run well under 3″ — standard widths cover you.
Wide chassis fore-ends and wing setups are why the X exists: an inch and a half wider, so a 4–4.5″ fore-end that outgrows a Mini drops straight into a MiniX.
The overlap is the point
Notice a MicroX (3.5″) takes a wider fore-end than a Mini (3″). That’s deliberate — the X gives you width without stepping up a size class, so a wide-chassis shooter can keep a smaller, lighter bag instead of hauling the next size up. Need more mag clearance? That’s bag size — Micro least, Max most.
These are minimums, not pairings
A wider bag always runs a slimmer fore-end happily — a MaxX with a 3″ sporter stock is fine. The limit only bites when the bag is too narrow for the rifle.
Two-second answer:
The Bag Finder asks your fore-end width and does the table for you →
Shooters' notes from College Station
Fill science, match-prep checklists — and limited runs sell to the list first.