So what to do with a dozen cards when on a 7 night cruise and OCD enough to want to pack as lightly and compactly as possible? I could not find a high capacity compact case for just SD, they always seemed to have extra sleeves/slots for sizes I don't use, and were bulkier than I cared for.
I can sew, and have made some foam/fabric ones before, but they were only bandages, not a cure for my ills. Lo and behold at the local Big Box store today, in the travel toiletries section, were these little beauties - toothbrush head covers. It was the little angled notch that intrigued me, so for a $0.97 gamble, I grabbed a pair and headed for home with fingers crossed.