​​​​​​​​ ​​Inland Letter Card(ILC) An ILC is a communication, which is contained on a sheet of paper with prescribed size & folding. An ILC is used for transmission within India only.​ ​Maximum Weight5 gramsThe dimensions of an ILC including its flaps when unfolded or folded shall respectively be as follows:UnfoldedMaximum30 cm x 21 cmMinimum28.2 cm x 18.2 cmFlap Inland Letter Card will have three flaps, one each one on the left and right side not exceeding 1.5 cm by 10 cm and another on the top side not exceeding 1.5 cm by 21 cm. Flaps are not required if the Inland Letter Card can be closed by any other effective process.Folded Maximum21 cm x 10 cmMinimum15.2 cm x 9 cm Paper Quality of Inland Letter Card70 GSM Inland ​Letter Cards of private manufacture suitably folded and closed on all sides through gumming or any other effective process, may be conveyed by post, provided the dimensions and other conditions mentioned in this rule are complied with.