The grey button-placket jacket is shown over a dark top with a relaxed-looking shoulder and a collar. If you want room for a shirt or thin knit, choosing a larger size changes more than the chest. In this jacket’s M–2XL chart, each size step adds 3 cm at the chest, 2 cm at the shoulder, and only 1 cm at the sleeve and back length. Here is a way to check the layer and the cuff together before picking a row.

Measure a jacket over the layer you actually plan to wear

Put on the shirt or knit you would wear under this jacket, then choose a jacket you already own that gives you the amount of room you like. Measure that comparison jacket at the chest, across the shoulders, along the sleeve and down the back center using one consistent method. If you measure the chest flat, double it before comparing a circumference. The MAXCT chart does not define its measuring points, so a close result is a reason to ask for the method, not a guarantee of fit. The general shirt-and-jacket layering guide offers a broader starting point.

See what sizing up buys you at each point

Suppose your comfortable comparison jacket measures 116 cm around the chest, 51 cm at the shoulder, 60 cm along the sleeve and 70 cm down the back. These are hypothetical garment measurements, not a body-size recommendation. The listed L is 1 cm narrower in the chest, matches the shoulder, and is 1 cm shorter in both sleeve and back. The listed XL is 2 cm wider at the chest, 2 cm wider at the shoulder, and matches the sleeve and back length. XL is the first row to compare if those four reference numbers matter together. The shoulder shape, where the sleeve is measured and the intended ease could still change the result.

From M all the way to 2XL, the chart gains 9 cm at the chest but only 3 cm in sleeve length. That difference matters if your reason for sizing up is an underlayer: you may get more body room without the same increase at the cuff. Conversely, if your current jacket already has the right chest but sleeves that feel short, the next size adds only 1 listed centimeter of sleeve. Check your preferred cuff position with your arms relaxed and then bent, and compare it with an existing jacket before choosing on chest alone. The chart gives no cuff circumference or armhole depth, so it cannot establish how a thicker sleeve will move inside this jacket.

Use the photo for style, and the chart for a first fit comparison

The gallery pairs the grey jacket with a dark inner top and light trousers. That high-to-low contrast makes the jacket the middle tone of the outfit. A similar pairing is a styling idea if those pieces are already in your wardrobe; the photo is not a test of warmth or layering capacity. The listing says 60% polyester, 30% cotton and 10% spandex, but it gives no independent stretch or weather rating. Do not turn the spandex percentage into a promised amount of give.

The product page lists Grey as the color and M, L, XL and 2XL as sizes. Its model note says a person listed at 172 cm and 56 kg tried M. That is one photographed context, not a conversion from height or weight to your size. Before ordering, confirm the selected row and compare your own jacket over the intended layer at all four measurement points. Ask MAXCT for the measuring method, cuff and armhole dimensions if those missing details would change your choice.