Whatever you choose to make, some measurements are needed to begin with.
It is best not to measure yourself. That won’t tell you how much extra you should allow for comfort and ease of movement. Measure something that fits in the way you want the new sweater to fit. If necessary take measurements from different garments to get what you want. The most important measurements are shown on the diagram. You won’t need them all right away.
Note: ‘sweater’ really means any upper body garment.
Opening up the shape in different ways might suggest very different ways of tackling your project.
It may be difficult to believe that the waistcoat outline below is merely the sweater without its sleeves.
The sweater shape can be made up from very simple plain squares ...
... or patterned in a variety of ways.
The designs below are all shown on the same basic sweater shape. They are just ideas to start you thinking and can be used on jackets, waistcoats, shawls, etc. as well as on non-clothing items.
The simplest sweater shape is one with no shaping in the sleeves. Such a sweater can be finished off with a simple straight edging, turn-back cuffs or by gathering into a band. Shaped sleeves may require a little more thought, especially when the knitting is not all in the same direction. If in doubt, draw out the sleeve (or any other troublesome pieces) at full size and adjust your shapes to fit to this large template.
Waistcoats and sweaters can use the same methods though the pieces may need to be split in different ways.
Try working from the centre outwards in all directions