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.
A4 paper is the size most used in the world. The dimensions of A4 is 297 x 210 mm or 11.69 x 8.27 inches. It has an area of 0.062 mÂ², which corresponds to 0.07 square yards, 0.65 square foot, or 93 square inches.When usual and recommended printing margins are put, the printable size of A4 is 247 x 170 mm.4 was obviously the right size for these purposes. Today, it is used for all printing, letters, magazines, forms ... that can be found in everyday life. A4 is a half an A3, quarter an A2, for larger sizes, and corresponds to 2 A5 sheets, 4 A6 sheets or 8 A7 sheets for smaller sizes.