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An infinity dress guide, which even a blond like me can understand!
As I was browsing through the internet I stumbled upon the infinity dress, a dress that has an infinite different ways to wear it. While browsing through all of the different ways I could wear it, I found a few I really liked! I was hooked! 
I started looking for patterns online, found some too! Unfortunate for me, all of those patterns were intended for small chest skinny girls, who can wear this dress open backed and bra-less, I cannot. I had no choice but to replan the dress patterns to fit my bra + modesty requirements.
Me, my mother and her superb sewing skills started this project together. We didn’t get mach salvation from the guides online, so we recalculated the Measurements as we saw fit, with a lot of try and error (which we will try to spare you).
And this is the story of how this guide was born!
 
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Step 1: The fabric

Picture of the fabric
What fabric should I buy?
Flexible and heavy (I recommend some combination of Tricot – Lycra)

How mach fabric should I buy?
The fabric should be 4m long and 1.5m wide (1.5m is the standard)

Attention!
The length of the skirt is determent by the width of the fabric, the rest of the fabric is used for the straps, anyone who is taller or wider and want more then 2.5m straps (not recommended!) should buy more fabric accordingly.

Note: from the excess fabric marked in the layout as X I sewed a tights pants.

Step 2: The skirt

Fold the fabric in half along the length of the fabric.
fold the end of the fabric to the length of 75cm. (you should have 4 layers of fabric with the length of 75cm)
Mark the radius of the skirt (75cm) from the corner and cut.

Attention!
If you use a fabric with a pattern on it, make sure its in the right direction.
The up side of the skirt is toward the corner, and eventually this is the side that will be connected to the front of the dress.

Waist radius calculation:
1) Measure your waist
2) This is the formula I used:
R=P/2pie
For the blonde of us, you need to take your waist Measurements and divide it by 6.28 .
in theory I should have taken my waist measurements (78cm) and divide it by 6.28, that gives me a 12cm radius.
What I actually did in the end was cutting half of that (7cm) because the fabric was very stretchy. I recommend cutting les and widen the radius one cm at a time, other than cutting too mach and discover the hole is too big.

In conclusion: I cut 7cm instead of 12 and it came out great!

In the pictures you can see that eventually the skirt opening is determined not by the waist, but by the chest or the ass(you need to wear the dress from one of those directions!)
You can also see in the picture that you can skip the waist strip step if you like, and sew the strips straight to the skirt.

Step 3: The straps:

Picture of The straps:
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The straps in my dress are 30cm wide and 2.5m long.

To determine the wide of the straps, I measured the length from the middle of my chest to my armpit line. (30cm)
If you are thinner you can make the straps thiner, but I don’t recommend that.
The length of the straps was determined from internet recommendations and try and error (Unfortunately). I truly think that 2.5m is enough for everyone, if you are substantially taller or/and wider then me you can make the straps longer (in that case you should by more fabric).

Measure 30cm all along the length of the fabric and cut.

Step 4: The waist strip:

The waist strip doesn’t show up in any of the online designs, I have added it for comfort and modesty (I don’t like my bra showing from the front or the behind).  And anyway, if you do want a less modest dress you can always fold it and hide it behind the skirt easily.

Measure the chest again, this time from top to bottom, 20cm.

in the picture you can see me measuring 20cm along the width of the fabric, which I previousely folded.

Waist strip length
in Theory my waist is 78cm around. Remember that the fabric stretches! Therefore (with some try and error) I reduced the length of the strip to the minimum which will allow either my chest or my ass to go through. Eventually I sew it at 70cm (35cm in a folded fabric)

On the 20cm strip I just cut , I measured 34 cm along the length, cut and sew.

I think it goes without saying, but match the thread color you use to the fabric.

Step 5: Connecting the straps to the waist strip:

I decided I wanted a 3cm Overlap of the straps in the front of the dress (I didn’t want all of my chest to be out there, the boys can use some imagination sometimes!)

Another problem popped.
The straps being 30cm wide were too long and passed the armpit line, that happened because of  the length difference between the chest and the waist.

I solved this problem with a combination of two methods.
I let the straps pass the armpit line around the back by 4cm, and the rest of the fabric, that i had left on the front, I collected with Equal folds and later on sew it stretched. 

If you don’t want to add the waist strip to your dress, you should add the straps directly  to the skirt using the same method.

You can see in the picture that I decided to pass the side point (armpit line) by 4cm, also to hide a bit the side of my bra.

the execs fabric being folded evenly-
One of the methods is to find the middle points each time and pin them together..

In the end we should have a waist strip that the straps are connected to in one side (the side without the suture!)

Attention!!
All of the pictures in this step demonstrate the connection of the straps directly to the skirt, and therefore the patters are facing each other.

Step 6: Connecting the skirt:

Picture of Connecting the skirt:
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Make sure you connect the skirt in the right order: inside the skirt, then the straps, then the waist strip. Make sure the fabric is in the right direction!

The side of the fabric you connect is very important:
The straps and the waist strip should be with the pattern toward the inside (the suture is inside).
Now you add the skirt from the inside! The pattern toward the waist strip.

Step 7: Sew the whole thing together

Picture of Sew the whole thing together
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If like me you were lazy and worked only with pins, make sure you remove the pins wile sewing, or it will break your sewing machine.
Sew slowly, its only one suture! Take your time!
Stretch the fabric wile sewing so the suture will be elastic and stretch with the fabric.

Step 8: Enjoy your new dress!

Picture of Enjoy your new dress!
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There are a lot of different options online, and its really fun to play with it yourself!
Scondy2 years ago
What a great tutorial! I definitely have to try this. As a curvy girl, I have the same problem with most of the infinity dresses out there - I just can't go braless! Thank you for posting!
lschuch12 years ago
I love your beautifull dress, you are very clever. I think I should make one for my daughter Jackie...
I think you did a great 'ible! I've been searching for an Infinite Dress for ages, since the commercial dissapered from this commercial tv station, and this dress looks much like one on the commercial. One question: is the material you used double sided, or did you sew two materials together?
Having a little trouble with your fabric width, are you sure you don't mean 150 cm wide? If not, where does one get tshirt fabric with lycra 1.5 m( m which to me stands for meter) wide as a standard? What is a teids? Just trying understand a pattern I would definitely like to make.
1.5 metres is 150cm which is1500mm
nupharhall (author)  tobyker3 years ago
I didn't really know how to translate Tricot, but I think this is the world I meant by T.
Most fabrics have a minimum of 1.5m wide when you buy them.
Again I don't really know how to translate it but I meant tights pants.
M does stand for meter.
Sorry for my poor English, I do relay a lot on google translator … :)
No need to apologize for your English skills. Your English skills far exceed my "any other language than English" skills. I do well to stay out of trouble ordering food when traveling in Europe. :)

Beautiful design, designer, and easily followed instructions!

Thank you :)
I completely agree with JWEngland

Reminds me of the old joke: People who speak 3 languages are trilingual. People who speak two languages are bilingual. People who speak one language are Americans. :)
Thanks for clarifying that , I guess I'm just not used to using 1.5 m as width, thanks again
In the US, most knit fabric is 60" wide, which is ~1.5M, which =150cm.
emmakrazy3 years ago
You did an excellent job showing how to putting it all together. I love how you wear it also. Very beautiful! thanks for sharing.
Peg1623 years ago
Excellent!
digimancer3 years ago
Cute :)
sms0173 years ago
Love this dress. What language do you speak?
suayres3 years ago
Very clever, flattering, and practical--and beautiful, too! I also would like to know what "teids" are (I think I detect AutoCorrect's sticky fingers in evidence, lol!)
nupharhall (author)  suayres3 years ago
Thx so mach!
Lol, what you see isn’t auto correct, its Google translator + my poor English.
I think I meant tights pants. Correct me if it still doesn’t make sense. :)
Asylinn3 years ago
Where did you get your fabric?? Love it
nupharhall (author)  Asylinn3 years ago
Thx :) I got my fabric from a little shop down town were I live.

I am going to show this instructible to my wife she made her own wedding dress and all special occasion dresses. She even made the suite our son wore to our wedding.
nupharhall (author)  Josehf Murchison3 years ago
Wow I'm honored!
And your wife is awesome! Making her own wedding dress is so special!
bcorson13 years ago
Great Job !
dangerine3 years ago
Pure brilliant on the modesty strip!!!
sreeci3 years ago
Amid all the technical jargons and mind boggling schematics and impractical electronic projects (for normal people) this project is so welcome, such a great contrast and really practical. Thank you. Please post more.
danzo3213 years ago
I found somewhere a long tube of a heavy jersey fabric in a lilac tone. Seemed to be woven as one continuous tube. Would make a great tube dress or skirt. Anyone seen this form?
This is great! Thanks!

I've seen lots of different tutorials for this kind of dress online but I love the wide waist piece you added. It makes the dress much more modest and versatile for those of us who are well endowed!

One thing you might consider is doubling up the fabric for the straps when using a non-reversible fabric. It would use a little more fabric but it would give it a more finished look. It looks awesome either way though!

Thanks for taking the time and all the pictures!
This is the sort item women used make fior themselves all time. but its becoming a lost art because of big box stores effects on commerce. i like that you worked on the instructable with your mom helping. we forget how important it is to have advisors and mentors. i was impressed and i'm a guy with a skirt i saw called the sweet spot skirt on the internet. it was multi demensional skirt that adjusted to fit young women to older women it was reversable as well.that lady made business out selling them once she learned how to. so i encourage you to make more for your own wardrobe and skill set. great ible
nupharhall (author)  rapidprototyping3 years ago
Thx so mach. Actually one of the reasons I made this intractable was because all of my friends wanted one too! And I do think this is an important dress for any girl to have. And it is very interesting to hear the story behind the skirt! I have a few of those skirts (who don’t gain a few pounds over the winter?) and never know that story :)
my bad i dont have a skirt lol
scoochmaroo3 years ago
Great project! I had lots of fun making mine but the straps came out a bit narrow in mine.
nupharhall (author)  scoochmaroo3 years ago
Thx! Your project is grate to! I was looking at it for references as well! but because my body type is different than yours I did widen the strap on mines.