Squaring Up Your Fabric
Grain, prewashing, scrap tests — all done. Now we prep the fabric to cut. People skip this step, then wonder why their blocks buckle like potato chips later. I skipped it once. My very first block ever, I cut every square off-grain — didn't even know grain was a real thing — and it bowed no matter how many times I pressed it. We're not skipping this.
Squaring up means truing one edge of your fabric straight and on-grain before you cut anything from it. Straight off the bolt, fabric almost never is. It gets tugged and rolled crooked at the store. Prewash it, and the wash and dry shift it around even more.
What you need on the table
- Your fabric, pressed. Lift and set the iron, don't shove it around — that's how you stretch things off-grain in the first place.
- Your cutting mat
- A long ruler, the kind that spans at least 18 inches
- Your rotary cutter
The steps
1. Fold it in half, selvage to selvage.
Lay the fabric out. Bring the two selvage edges together and match them up. Don't worry yet if the fold looks wavy or the cut edge looks crooked. That's normal, and it's exactly what we're about to fix.
2. Smooth it flat on the mat.
Line the fold up on one of the mat's horizontal lines. Smooth out bubbles and diagonal pulls with your hand. If it wants to pucker, don't force it flat with the iron right now. Work it with your hands first. Forcing it hides the problem instead of solving it.
3. Make your first cut across the short end, near the crooked edge.
Set your ruler perpendicular to the fold. Use the grid lines on your mat to get a true right angle — don't eyeball it. Cut a thin strip off to clean up that ragged edge. That's your new straight edge, and everything else gets measured from it.
4. Check your angle before you trust it.
Unfold the cut edge. Look at it against the grain lines you learned last week. If it's true, the fold lays flat with no ripple at the crease. Still bowing a little? Refold and true it up again. Don't spend twenty minutes obsessing — one or two passes should get you there. If it won't come true after that, the fabric got pulled pretty badly off-grain at some point, and you may need to trim more off before you find true.
A quick word on the rotary cutter here
You're making a long cut across doubled fabric, which means more resistance than a single layer. Keep your fingers well clear of the ruler's edge. Don't rush the cut just because it's a long one. Same rule as always — close the blade the second you set it down.
The one I don't have a spreadsheet for
I track basically every project I make — yardage, hours, cost per hour if I'd sold it, the whole thing. It's saved me from buying fabric I already owned more than once. Do the same.
Except one. I made most of a baby blanket for Henry in the weeks before he was born, sitting up at 4am when I couldn't sleep, squaring up scraps of flannel at my kitchen table because it was the only thing that settled my head enough to let me go back to bed. I finished the binding the day we brought him home. Never once thought to log the hours on that one. Didn't feel like a project. Felt like getting ready.
Most of what you square up in this class won't carry that kind of weight. It'll be a runner for your table or a gift for somebody in the ward. The process is the same either way. Getting the grain true at the start is what keeps the rest of the piecing honest. Fabric doesn't lie to you. Off-grain going in, it'll show you exactly where later.
Before next time
Square up the fabric you picked for your runner top and backing — both pieces — and bring them squared and pressed to our next session. Don't cut your final pieces yet. We'll do that together so I can check your grain before you commit.