The grey gallery view of the MAXCT stand-collar zip jacket shows a high neck, a central zipper and a front pocket area. Those details can make it a useful layer over a tee or a light knit, but the photo cannot tell you how much room your own layer will need. Try the following comparison with a zip jacket you already wear; the goal is to make the M–2XL chart answer your wardrobe question, not to turn the model’s size into a recommendation.

1. Zip your reference jacket over the intended layer

Wear the shirt or knit you expect to use under the new jacket, then zip your reference jacket and move your arms forward. If it pulls across the chest, choose a different reference garment that actually has the ease you want. Lay that reference flat and record its chest and shoulder measurements using matching endpoints where possible. This listing gives chest figures of 108, 111, 114 and 117 cm for M, L, XL and 2XL, while shoulder width moves 56, 57, 58 and 59 cm. It does not define the chest measuring route, so ask how the seller obtained the figures before comparing them directly with your body circumference.

2. Compare back hem and sleeves together

The chart calls its length “back center length”: 64 cm in M, 66 in L, 68 in XL and 70 in 2XL. Sleeve lengths are 54, 56, 58 and 60 cm. These two measurements change by 2 cm at each step, while the listed chest changes by 3 cm and shoulder by 1 cm. To see why the combination matters, imagine that your comfortable zipped reference measures 110 cm at the chest and 65 cm from the same back-center endpoints. M is 2 cm narrower and 1 cm shorter than that reference; L is 1 cm wider and 1 cm longer. L may be the closer starting comparison, but you still need to compare its 57 cm shoulder and 56 cm sleeve against the sleeves and shoulder you actually like. The example is hypothetical and cannot predict fit on a person.

The source says the garment is measured flat by hand and allows 1–3 cm variation. That range is as large as some adjacent size differences. If your choice depends on a single centimeter, request a current measurement of the exact size. The model is listed as 172 cm and 56 kg in M, but the listing does not give his body dimensions or the ease he wanted.

3. Check the collar and front in use

Zip your own jacket high while sitting and turning your head. That simple rehearsal tells you whether a standing collar is a shape you enjoy over your planned neckline. In the gallery, the grey option is shown zipped and the black option appears among the thumbnails; inspect both enlarged views for the color and front shape you want. The images do not establish whether the zipper opens from both ends or how deep the front pockets are. Ask if either feature determines your choice.

The source lists 100% cotton, but gives no fabric weight, shrinkage treatment, care label or warmth test. Do not use the photograph as a performance specification. The current product page carries the live Grey/Black options and the four-row chart; confirm any missing construction or care detail before ordering.