What size charger box do I need for wall bricks, prongs and cables?

How do I measure a wall charger, AC prongs and bundled USB-C cable?

Start by placing your physical production charger (or exporting its 3D STEP assembly) on a flat desk and checking whether the AC prongs fold inward or stay fixed. On a folding-prong GaN cube, measure the three housing dimensions with the blades folded shut. On a fixed-prong adapter, measure the full nose-to-tail dimension from the backUSB-C port face to the very tip of the metal blades, then add a 0.25-inch air and card-baffle gap ahead of the prong tips so parcel drops never drive the metal blades through the outer box wall. Next, decide whether your charger ships solo (brick + folded safety sheet) or as a combo kit with a 1-meter or 2-meter braided USB-C cable. Stacking the coiled cord in a hidden lower compartment underneath the charger cradle keeps the front face of your custom GaN charger boxes compact so more units fit on a retail pegboard hook.

1. Folding-prong brick body: measure Length × Width × thickness with the NEMA blades folded flush into the housing.
2. Fixed-prong clearance: include the full blade protrusion (0.63 in for US NEMA, 0.75 in for EU Europlug, 0.90 in for UK 3-pin) plus a 0.25 in card-baffle buffer.
3. Paperboard cradle rim: add 0.25 in per side (0.50 in total to L and W) so the folded tray suspends the heavy brick away from the outer carton walls.
4. Bundled USB-C cable well (+H): add 0.625 in to Height for a 1-meter PVC or braided cord, or 0.875 to 1.0 in for a thick 2-meter 240W E-Marker cable.
5. Safety foldout margin: size the accordion safety manual 0.25 in smaller than the inside box floor so it rests flat under the tray.

What are standard inside box dimensions for common charger types?

Although CubitPack cuts every carton and inner cradle to your exact sixteenth of an inch with no tooling charges, most wall chargers, magnetic wireless pads, travel adapters and desktop charging stations fall into nine standard size brackets. Use the chart below to benchmark your product before measuring your physical sample. Notice how single-brick wall charger cartons stay between 1.5 and 1.75 inches deep front-to-back (Width W). Keeping the depth slim prevents heavy copper-and-ferrite transformers from tipping forward when the carton hangs from a retail Euro peg hook.

How much clearance do fixed US, EU and UK plug blades need inside the box?

Fixed metal plug blades are the number-one cause of scuffed or punctured charger packaging. When a carton drops onto its front or bottom face in parcel transit, the mass of the internal transformer drives the metal blades outward like a chisel. If the blades touch the inside of the outer carton wall directly, they will crease or pierce right through the board. To prevent blade punctures, our design team builds a recessed prong chamber into the custom cardboard insert. The cradle grips the wider plastic shoulders of the charger housing so the metal tips float in an empty air pocket at least 0.25 inch away from the outer carton wall, backed by a folded double-layer card baffle.

How do you size multi-cavity boxes for bundled USB-C cords and travel plug heads?

When your charger ships with a detachable USB-C cable or a set of interchangeable international plug adapters, every accessory needs its own walled compartment. Placing a metal-tipped USB-C cable or a loose UK 3-pin adapter in the same open cavity as a matte-black or high-gloss GaN brick guarantees scuff marks across the charger casing before the customer ever opens the box. For a wall brick plus a single USB-C cord, a two-tier vertical stack (brick in the top cradle, coiled cable in a 0.625 to 1.0-inch lower well) keeps the carton narrow and peg-hook friendly. For a universal travel charger with slide-on US, UK, EU and AU heads, a horizontal grid inside a custom tray and sleeve box or custom two-piece box displays the main GaN block beside each regional plug head on one level.

How should I size boxes for 3-in-1 magnetic wireless stands and desktop hubs?

Unlike pocket wall bricks, 3-in-1 magnetic nightstand chargers and 200W multi-port desktop stations have weighted metal bases, cantilevered watch and earbud arms and thick detachable AC power cords. If the stand does not fold flat, measure its assembled 3D bounding box (Length × Width × Height) and add 0.50 inch on all sides for a die-cut EVA foam insert or heavy corrugated cradle. Hollow out the open negative space underneath the stand's upper magnetic arm inside the foam or corrugated block to house the wall power brick and braided cord. That nested layout cuts the total cubic volume of the box by 25% to 35% and lowers dimensional shipping weight. When sizing a carton for a portable Level 1 or Level 2 EV travel charger with a heavy 20-foot J1772 or NACS cable, coil the cable to its natural minimum bend diameter first, measure the coil diameter and stack height, and recess the control box in the center hole of the cable loop so the entire kit packs into a compact square E-flute mailer.

1. Flat Qi2 magnetic pucks: add 0.75 in around the puck diameter for a circular card well and underside cord channel.
2. Non-folding 3-in-1 stands: nest the wall adapter box inside the void under the upper phone/watch arm to shrink box volume.
3. Desktop 200W charging hubs: divide the carton into a 60% main device cell and a 40% side chamber for the C5/C7 AC power cord.
4. Portable EV travel chargers: coil the heavy rubber cable around a center well that holds the control brick and NEMA 14-50 plug.

What are the most common charger box sizing mistakes?

Almost every charger packaging issue comes from ignoring fixed prong length or underestimating the coiled thickness of high-wattage braided USB-C cords. Check these five points before locking your dieline

1. Measuring only the plastic brick body on a fixed-prong adapter and forgetting the 0.63 to 0.90 inch metal blade length plus a 0.25 inch card baffle.
2. Designing a shallow 0.4-inch lower cable well for a thick 2-meter 100W/240W braided USB-C cord, which bulges the upper charger tray upward.
3. Packing slide-on UK, EU and AU travel plug heads in a loose polybag beside the charger where metal pins scratch the adapter shell.
4. Making a retail peg-hook charger carton deeper than 1.75 to 2.0 inches front-to-back, causing heavy GaN bricks to tilt forward on store hooks.
5. Forgetting to leave two 0.6-inch finger notches on opposite sides of a snug GaN brick cavity so customers can lift the heavy adapter out.

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