Compact 3 dB 0/180o microstrip couplers in ring and square configurations are proposed and discussed. In a ring form, the coupler may be designed for symmetrical ports about either one axis or two axes. The proposed configurations introduce significant size reduction, which is the most important demand for microwave integrated circuits (MICs) and monolithic microwave integrated circuits (MMICs). Different couplers are designed, and simulated at 1 GHz. The IE3D software is used in order to validate the design procedure. The designed coupler in ring shape is simulated and implemented. The experimental results agree well with the theoretical prediction