But The Inner Circle is still significantly smaller than Tinder and some of its other rivals, which boast tens of millions of users.
So if you are trying to date something near the year of size change, the size can be a great clue.
After several years selling and handling old sewing patterns and catalogs, I have compiled this list of dates and pattern numbers.
On an Access form, use the Date Picker to enter the current date.
If the field is set up as a Date/Time field, the Date Picker icon appears when you click in the field.
"Whether they are from the creative or corporate world, it's about having that ambition and zest for life.
And it's these qualities that makes The Inner Circle work for our members around the world." The Inner Circle, similar in many respects to The League, claims to be a profitable business.
By the 1940s patterns gave bust and hip measurements but often the waist was not given (due to the fact that the sewist could change that element). In 1956 sizing changed and a Size 12 was for a 32 inch bust.
In mid 1967 the standard changed once again and a Size 12 became a 34 inch bust and remains so today.
However, Krayenhoff was unable to disclose any of the company's financials.
It is also active in Amsterdam, Barcelona, Milan, Paris and Stockholm, as well as London and Berlin.
The company makes money by offering a premium version of its app and a number of events that it puts on throughout the year including a polo event in Richmond, South West London, where tickets were sold for £25 each.