Flexible and stretchable radiofrequency coils for magnetic resonance imaging represent 15 an emerging and rapidly growing field. The main advantage of such coil designs is their conformal 16 nature, enabling a closer anatomical fit, patient comfort, and freedom of movement. Previously, we 17 demonstrated a proof-of-concept single element stretchable coil design with a self-tuning smart ge-18 ometry. In this work, we evaluate the feasibility of scaling this coil concept to a multi-element coil 19 array and the associated engineering and manufacturing challenges. To this goal, we study a dual-20 channel coil array using full-wave simulations, bench testing, in vitro, and in vivo imaging in a 3 T 21 scanner. We use three fabrication techniques to manufacture dual-channel receive coil arrays: 1) 22 single-layer casting, 2) double-layer casting, and 3) direct-ink-writing. All fabricated arrays perform 23 equally well on the bench and produce similar sensitivity maps. The direct-ink-writing method is 24 found to be the most advantageous fabrication technique for fabrication speed, accuracy, repeata-25 bility, and total coil array thickness (0.6 mm). Bench tests show excellent frequency stability of 128+/-26 0.6 MHz (0 to 30% stretch). Compared to a commercial knee coil array, the stretchable coil array is 27 more conformal to anatomy and provides 50% improved signal-to-noise ratio in the region of inter-28 est.