The week starting December 8 will witness four mainboard and seven SME IPOs hit the stock market. The mainboard issues include Wakefit Innovations' ₹1,289-crore IPO, Corona Remedies' ₹655-crore IPO, Nephrocare Health Services' ₹871-crore IPO and Park Medi World's ₹920-crore IPO. KV Toys India, Prodocs Solutions, Riddhi Display Equipments and Unisem Agritech are among the upcoming SME issues.