The Sony A7 IV and Canon EOS R6 Mark II are close enough in class that the travel-bag answer depends less on brand and more on the mounted kit box. Sony’s published A7 IV body dimensions are 131.3 × 96.4 × 79.8 mm. Canon’s published R6 II body dimensions are 138.4 × 98.4 × 88.4 mm. The Canon body is the larger published box, but the standard zoom changes the practical carry question.
The quick answer
With the standard zooms in our current source records, both travel kits land in the same fit tier. The Sony A7 IV + FE 24-70mm F2.8 GM II guide and the Canon R6 II + RF 24-105mm F4 L guide each compute to 16 bags that fit with room, 2 that are tight — measure carefully, and 4 that exceed the published interior.
The smallest source-cited bag in this dataset that rates fits with room for both kits is the Tenba BYOB 10 Camera Insert, with a published 25 × 19 × 10 cm interior. The Think Tank Mirrorless Mover 25 V2 is smaller by interior volume, but it rates tight — measure carefully for both kits. That is a planning estimate, not a promise; if you are buying near the edge, measure your packing layout and keep the return policy in play.
Body size: Canon is the larger published box
The R6 II is wider, taller, and deeper in the published manufacturer dimensions: 138.4 × 98.4 × 88.4 mm versus 131.3 × 96.4 × 79.8 mm for the A7 IV. If you were packing body-only, that points toward Sony as the easier shape. Real travel carry usually means a lens is mounted or sitting beside the body, so the lens record matters as much as the body record.
Standard zoom: Sony is the longer lens in this comparison
The Sony FE 24-70mm F2.8 GM II is listed at 87.6 mm maximum diameter by 120 mm long. Canon’s RF 24-105mm F4 L IS USM is listed at 84 mm maximum diameter by 107 mm long. So the Sony body is smaller, but the Sony standard zoom is longer; the Canon body is larger, but the Canon standard zoom is shorter.
That trade is why the computed bag outcome comes out nearly even. The binding dimension moves between body depth, lens length, and bag interior depth depending on the compartment shape. Litres do not settle it. Published interior geometry does.
Smallest bags that stay in play
For both kits, the first fits with room option by interior volume is the Tenba BYOB 10 Camera Insert. If you want a slightly roomier cube, the WANDRD Essential Camera Cube also rates fits with room for both. If you want a small sling instead of an insert, the WANDRD ROGUE 6L Sling V2 rates fits with room for both standard-zoom kits in the current matrix.
The useful warning is the same for both systems: the Peak Design Everyday Sling V2 6L exceeds the published interior for these standard-zoom kits, while the WANDRD 6L sling clears. Same nominal 6-litre class. Different interior box. The bag does not read the marketing label.
Which would I pick for travel packing?
For bag fit alone, neither body wins decisively with these two standard zooms. If you already own the A7 IV, the 24-70/2.8 kit is not meaningfully harder to place than the R6 II + 24-105/4 in our 22-bag matrix. If you already own the R6 II, the larger body is partly offset by the shorter 24-105/4. Use autofocus, lens ecosystem, weight, and shooting preference to choose the camera; use the fit table to choose the bag.
For the actual bag shortlist, start with the two computed kit pages: A7 IV + 24-70 and R6 II + 24-105. Then open the camera comparator for body-level spec checks, or use the fit checker if you want to swap the lens.
Every verdict here is computed from published camera, lens, and bag interior dimensions. It is a planning estimate, not a guarantee — padding, divider layout, straps, and lens hoods can change the real-world feel.