One of the easiest ways to make a swimsuit more supportive for larger busts is to sew wider straps. It’s also a cute way to make your suit sportier, regardless of your need for support. Check out our tutorial here for a couple different ways to sew wider straps. In this example I used a wide plush-back waistband elastic for my straps which is lots of fun, but the join between elastic and swimsuit isn’t as pretty as with a narrower strap so I wanted a creative way to cover the join.
The Laminaria Swimsuit normally uses a small facing to neatly join the narrow strap to the top of the front, but that same technique doesn’t work well with the wide elastic. It looks okay, but I wanted to figure out a simple way to make the join look even better than okay.
Cut a little rectangle of fabric that is 1/2” (two 1/4″ seam allowances) plus twice the width of your elastic wide and 1/2” (two 1/4″ seam allowances) plus twice as tall as you want the finished join to be – I used 7/8″ elastic and wanted it to be 1″ tall so my rectangle is 2 1/4″ wide and 2 1/2″ tall. Fold the top to bottom, right sides together and sew the rectangle into a tube using a 1/4” seam allowance. Turn the tube right side out.
There are 2 different ways to put the join onto the suit. If you are sewing the join before you attach the straps to your suit (i.e. if you plan ahead), then you can fold the tube right sides together, sew the raw edge with a 1/4” seam allowance, turn it right side out, and slide it onto your strap.
If you don’t plan ahead and your straps are already attached, wrap the tube around the join with the raw edges in back and hand stitch the tube in place.
For this Laminaria Swimsuit I also followed a hack tutorial to add contrast edging to the suit.