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.
1 PO boxes at a post office are going to come in five different sizes. 2  An extra-small box can fit 10 to 15 envelopes and measures at 3 x 5.5 x 14.75. 3  A small box can fit up to 20 envelopes or five magazines and a small box measures at 5 x 5.5 x 14.75.f you do not have a mailbox, a PO box is a great way to receive your mail. PO boxes are also great for privacy since it does not use your home address. This is many times used for those who own a small private company which they run out of their homes.