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Forum > Fitting Woes > crotch measurements ( Moderated by CarolynGM, Deepika)

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crotch measurements
Does this method work?
halleyscomet
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halleyscomet  Friend of PR
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Date: 8/7/12 6:42 PM

I love watching tutorials on You Tube!. I just saw a tutorial on how to determine your front and back crotch measurements. It said to take a tape measure and measurement from your waist in the front, through your legs to your waist in the back, divide that number by 2. One of your numbers subtract 1 inch for your front and add 1 inch to the other number for your back crotch length. Does this work for everybody? Mine figures out that my front is 13-1/2. I would look like Erkle and my back is 15-1/2. That for me figures out to be 29 inches which is what my overall measurement is but I would think that would position your actual crotch to not be where your crotch is actually at? Okay, I know that doesn't make sense!

JTink
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Date: 8/7/12 6:51 PM

Halley, I don't know about the adding and subtracting, but putting the tape between my legs from front to back, is the method I use for finding my measurment. It might not be "true" but it does give me an idea of the number I need. I still need to tweak, no matter what. I'm high waisted and my total is about 27.

CM_Sews
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Date: 8/7/12 7:01 PM

SureFit Designs, Front and Back Crotch Measuement Video

Glenda Sparling of SureFit designs shows that method in this video, saying that this is a fairly common measurement adjustment that works for many people - 2-inches less on the front of the body and 2-inches more on the back of the body. Then she shows another method, to double-check that standard measurement adjustment, using a plumb line to determine your inseam and get very accurate measurements for both the front and the back crotch measurements. She notes that if you have a tummy (oh, that would be me, alright) the plumb line method is going to give you more accurate measurements.

CMC

halleyscomet
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In reply to CM_Sews <<


Date: 8/7/12 7:15 PM

Yes I did see the video with the plumb line.

halleyscomet
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Date: 8/7/12 7:30 PM

When tweeking, how do you do this if you have to lengthen it a lot...I'm talking 4 inches! Most pants I've made I've had to lengthen the back crotch length 2 inches and I did it with the slash and spread method but I would think spreading it 4 inches is going to make the hips and side seams really wonky. I've been working on cutting out Simplicity 1852. The back measured 13 inches and the front 10. It said it sits 1 inch below the natural waist but from the picture, it looks really low rise. I need 17 max for the back and about 11 for the front. Would I slash and spread in two places then?

JTink
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Date: 8/7/12 7:43 PM

Halley, have you measured the front and back of a pair you have already made? What are the numbers? Does this fit you well?

If I need to add, I just cut across the lengthen/shorten line and add the amount I need. When I use to make trousers, I liked a higher, waistline. It was nothing for me to add at least 2 inches to the back and front. To me, a back measurement of 13 inches is super low. My front is at least 12 and the back I do about 15 or 16. I would just make a muslin to start with. Go ahead and cut across the lines and add what you need to the pattern(or the traced pattern piece). After you have made a quick and dirty muslin, you will be able to tell if things are swingin' a bit to low in the crotch or if the center crotch seem needs to be adjusted to the front or back. You can then pin up the amount that you need to remove from the altered lengthen/shorten line.

I've also done the plum line. All of this gives you a starting point. If you are dealing with the ever drooping butt like I am, I think there will still be tweaking to do and this method is a good start.

Miss Fairchild
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Date: 8/7/12 7:52 PM

Believe it or not, this is a really common measurement. I remember doing this when I was making pants in the 70's. Simplicity had a sewing guide that used this method. But it's not an exact science; for one thing, my front crotch now is 1" even lower than my back crotch, so the method doesn't work for me anymore. But it's a good way to start!

Lorraine Henry has a cool little kit you can buy. It's called Measuring Made Easy and in it are an instruction booklet and two tape measures: One is two ended and has a 0 in the middle, and the other has a little slider that you slide on the two ended one. This creates a sort of plumb line but gives you the measurements at the same time. I used her kit to find my crotch length and it's pretty accurate. I came across my kit the other day and thought I should sell it because I don't need it anymore.

Edited to add clarification. Thanks, CM Sews!

-- Edited on 8/7/12 8:03 PM --

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CM_Sews
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In reply to Miss Fairchild <<
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Date: 8/7/12 7:57 PM

Oh, I have "Measuring Made Easy" also.

I bought it from The Sewing Place (which has or is in the process of going out of business - no more MME). But it's also available at Islander Sewing Systems. Just FYI, as Miss Fairchild has only one MME.

CMC
ETA: Glenda has a new video "Short Front Crotch Length in relation to a Longer Back Crotch Length", video P.3.1 on this webpage.. Granted, this is related specifically to the Sure Fit Design system, but you may find it helpful, just the same.
-- Edited on 8/7/12 8:13 PM --

halleyscomet
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Date: 8/7/12 8:33 PM

Yes I have made some elastic waist pants that fit quite well. It's 17 for the back and 11 for the front. This pattern, however, is extremely low in the back by 4 inches. I altered the pants that fit well by cutting horizontally across but not through the side seam and spread it 2 inches. If I cut across the length/shorten line on this pattern and add the amount needed both on the front and back so the side seams match, then I'm going to end up cutting probably 2-3 inches off the front tapering to the side seam. I always found it easier doing it the other way. But with 4 inches, would it be possible to slash and spread several inches above the crotch and then again about 3 inches down from the waist? Hopefully, the hips and side seams won't turn out wonky then.

I normally don't have problems sewing pants to fit. I lengthen the back crotch length about 2 inches, shorten the pants length and they fit fine.

Marie367
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Date: 8/7/12 9:04 PM

I did this and it helped me get a pants pattern to work. I had alot of inches to add. I am tall so have always had to add length inches anyway but I couldn't get a pants pattern to work right. I was sure the crotch width was not right but could not figure how to measure it until I discovered this. I kind of guessed that my middleaged abdomen added 2" of the number I got but I still figured I needed to add to the crotch width (point). I ended up adding 2" to both front and back crotch point and a 1 1/2" abdomen wedge and a 1" to front and back length. I used a Burda pattern and now have a pattern that fits pretty well. This was a key for me.
PS: I didn't cut and slash the crotch point. That didn't work for me. I re-drew the crotch points longer and blended into the inseam following the same lines as the original pattern.
-- Edited on 8/7/12 9:08 PM --

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