It is one thing for your measuring tape to give you the correct figures, but quite another for that tape to remedy fabric that has been stretched, wrinkled, or marked too hastily. In textile work, measuring and marking are not merely warm-up exercises, they are foundational. The cut line must be easy to follow; the seam allowance must be even; the fabric must lie flat under your pins.
It doesn’t help that fabric isn’t paper. When you draw a line on paper, it stays right where you put it. When you put a mark on fabric, the fabric shifts under your hand, stretches at the edges, curls, or lifts when the marking tool is placed upon it. Woven cotton may sit relatively calmly, but the minute your tape measure touches a knitted fabric, it could shift. Slippery or loosely woven textiles may slide from their original position, so the line you’ve marked may look fine until you pick the fabric up and look again from a different angle.
It is wise to practice measuring and marking on a small piece of fabric before marking the piece you’re about to cut. Smooth out the fabric rather than pulling the corners. Place your tape measure or seam gauge against the fabric and make sure you’re measuring from the edge you want to be the edge. If the edge is not smooth or is fraying badly, maybe you should measure from the clean edge, or maybe you should make a trim sample. Marking a wrong line is easier than you’d think. You’re more likely to think you’ve measured correctly even though you haven’t and end up working from a marked line that may be slightly off even though the numbers are right.
Consider your marking tool, also. Marking chalk may be easier to see than a fabric marker but may not be as permanent (and thus may leave a lighter mark), whereas a fabric marker may leave a stronger mark that’s easier to see but that should be tested on a scrap before it’s marked on the fabric itself. Just because a dark mark on light cotton may be a fine choice for a test piece may not mean you should be using it for every piece of cotton you work with, if it doesn’t wash out readily. The point isn’t that you make a mark so your eyes won’t find it, but that you make a mark that’s easy for your eyes to find, that will guide your work but is not meant to be there forever.
Once you’ve made one line on your fabric, take a moment before making more. Look for the direction that the line follows on the fabric. Is it parallel to the grainline or is it crossing the weave? Look at the marked line again, touch the fabric near the mark. If you realize that the fabric has been stretched out of shape, smooth it again and start fresh rather than trying to fudge the first line to see if it’s “close enough.” It will take just a moment or two. It will help you with uneven hems, folds in the fabric, seam allowances that aren’t uniform down the entire length of the edge you’ve been marking.
Pinning and your marked line should be friends not enemies. The fabric should lie flat, with no bunching of the fabric when you pin. If the fabric is puckering between pins, you may need to place more pins. A few seconds adjusting the placement of your pins could make cutting and sewing that much easier, especially since your scissors should be following along the cut line rather than trying to catch and cut a line that’s being lifted or distorted by wrinkles and stretched fabric.
Often when you rush your measuring and marking, you won’t know about it until it’s too late. Your fabric may look fine while it’s lying on your work surface but not be fine after the hem is pressed, or the straight seam is sewn and pressed. You may have one side slightly too short or a seam that doesn’t lie flat. A corner may not lie right because it doesn’t have an even corner due to starting your fold line on a line that’s slightly crooked. A seam may be uneven because it was started from a line that didn’t follow the grainline and thus the seam allowance may be uneven. There’s nothing in this that means your textile work should be stopped, but it does mean that measuring and marking are steps that should be given your own attention and time.
It can be a valuable exercise to compare your marked and cut fabric with your finished sample. Did your cut edge follow the line? Did you have an even seam allowance? Did your hem press cleanly? Did your folds lie right? Try to keep your finished samples for comparison and write a few notes about the differences or what you learned. With time, measuring and marking will feel like less of an exercise of trial and error, even though your fabric is going to move, shift, stretch, fray or pucker when you handle it. Your hands will have learned how to prepare it before the scissors and needle ever arrive.