Periwinkle offers a lovely little flower, but it is the leaves and the seeds that are used in folk medicine. The leaves and seeds are rich in the chemical vincamine, an alkaloid that has positive effects on memory and has long been used to combat the effects of aging.eriwinkle is used in folk medicine in the Philippines as a remedy for diabetes. Most of these practices are still followed. Rosy periwinkle grows up to two and a half feet tall. Leaves are oval and have a glossy surface.
C4 envelopes are 229 x 324 mm in size and a A4 card blank can fit inside or an A3 card blank folded in half. These C4 envelopes are ideal for sending A4 documents or certificates. C5 envelopes are 162 x 229 mm in size and fit an A5 card blank or A4 card blank folded in half.
Choose from common greeting card sizes. Generally, you will base the size of your cards on popular envelope sizes. This will not only make them easier to package and sell, but they will also to tend to fit better into standard card rack sizes, which makes them easier to merchandise in stores or at craft fairs. Typical greeting card sizes include 4.25 by 5.5 inches, 4 by 6 inches, and 5 by 7 inches. If you're working with a printer, be sure that the cards come with envelopes. Note: Many find that the card size measuring 4.25 by 5.5 inches is a great format with which to begin your greeting card adventure.