Tackle Tray Sizes: How to Check Backpack Compatibility

Understand family names and depth

Plano's current Classic 3600 is listed at 10.88 by 7.25 by 1.75 inches, while its current 3700 50/50 Split is 14 by 9.13 by 2 inches. These examples show why the family number should lead you to a product record, not stand in for an exact size. Thin, standard, deep, waterproof and specialty versions can change the stack or latch outline.

When a backpack claims to hold a particular number of trays, identify the exact tray and depth used for that claim. Six 1.75-inch boxes make a nominal 10.5-inch stack before tolerances; six 2-inch boxes make a 12-inch stack. Do not use that arithmetic as a fit verdict—latches, dividers, compression and the opening still require separate checks.

Measure the box you will actually carry

Include hinges, handles and latches when measuring maximum outside dimensions. Then compare the usable interior width, height and depth of the backpack's tray bay. Allow practical clearance for inserting and removing the tray instead of assuming an exact friction fit will remain convenient when the bag is full.

The opening matters separately from the compartment. A rigid box may fit inside a space but be difficult to angle through a narrowed zipper entrance. Load the upper compartment as well during a trial, because a bulging jacket or food container can press down on the tray bay and change how easily the top box slides out.

Fit the box interior to the tackle

Measure long lures and consider whether dividers can be removed without leaving an unsuitable layout. Look at how small hooks and weights are contained. A tray with abundant nominal capacity may be inefficient if the compartments are too large for the tackle you carry or too short for your most-used bait.

Keep soft baits in storage compatible with their material and the maker's instructions. Do not assume every soft plastic can be mixed in one compartment. Preserve original labeling when compatibility is unclear. The backpack's job is to carry the selected containers; it cannot prevent materials inside a poorly chosen box from affecting one another.

Decide how many boxes the trip needs

Group tackle by the fishing you intend to do, then choose the smallest reasonable set of boxes that gives access to those presentations. Keep a reserve collection at home. A pack advertised for many trays can still work well with fewer, especially when the remaining space carries necessary clothing or food.

Use edge labels that face the compartment opening. Keep each tray's contents consistent enough that the label remains meaningful. A box called “today” can be useful for a changing selection, but it should be emptied and reset intentionally; otherwise it becomes another mixed collection that duplicates the rest of the bag.

Check the whole system before departure

Latch each loaded tray, place the stack in the pack and close the compartment without force. Lift the backpack, walk and set it down as you normally would. Listen for shifting and confirm that a box cannot slide unexpectedly when you open the flap.

Make sure loose sharp tackle cannot escape during retrieval. After fishing, separate used wet lures for appropriate cleaning and drying instead of closing moisture inside the clean collection. Check the label-facing edge and clearance again with all of the intended boxes loaded; a single empty tray trial can miss interference from the full stack.

Questions about Tackle Tray Sizes: How to Check Backpack Compatibility

Sources and further reading

• Plano: StowAway utility box families
• Plano: StowAway 3700 50/50 Split
• KastKing: KarryAll tackle backpack
• Plano: Classic 3600 dimensions