From Bra Maker's Supply:
The ever-so-practical Ingrid non-wired bra pattern may be your new everyday go-to bra. Our goal in creating this bra was to have a bra without underwires that supported the breasts without that characteristic collapse of the centre front that is common in other non-wired bras. We’ve solved that issue with an integrated bridge and a Gothic Arch.The split lower cup, plus the front and side panels were designed to keep the breasts directed forward yet still separated. The unique power net front panel helps keep air flowing in the central core between the breasts. Our pattern design team worked on creating many prototypes, each with a small improvement to the overall look or performance. Our testers were impressed that this non-wired bra could be worn for so many activities, including running a marathon!
In addition to the support elements incorporated into every Ingrid, we’ve listened to what you said you wanted in a larger size non-wired bra; we’ve added the option of a zip front closing or a hook and eye front closing. We have made it with the wide waistband elastic instead of the standard bottom band elastic – our wearers loved the comfort! We’ve even made Ingrid with the main cup lined with cut & sew foam! Try it with lace lined with sheer cup lining! Sew many options!
The sizing for the Ingrid non-wired bra pattern is a bit different from other bra patterns, in that we use the Bottom Cup Depth (BCD) to determine the size of the cup. This is the measurement from the wire line at the base of the cup up to the location of the apex. It is much more accurate than relying on Ready-to-wear bra sizing, which can differ from country to country. The BCD method of sizing bra patterns removes the doubt involved in traditional sizing, where the size names differ between manufacturers and so-called “sister sizing” doesn’t work between different pattern makers. In our system, if the BCD size you try is too small, you move up to the next one. It’s that simple! We’ve written a blog post about it here. Determine your BCD by measuring your best fitting bra between the bust point and the wire line directly below it. All BCD sizes from 2.75 to 9.0 are included in the pattern. Combine this cup depth with 1 of 11 band sizes from 26″ (65 cm) through 46″ (115 cm), making the Ingrid Bra Pattern size range equivalent to well over 200 unique bra sizes, including the sizes in-between that are normally not available.