Mass-radius relations of stars between 0.2 and 1.0 M_⊙ predicted by four stellar models (see text). The filled circles represent well-known LMDEB, used as benchmarks for the models. The triangles represent the location of T-Cyg1-12664 in the Çakırlı et al. (2013) paper and the diamonds are our solution for this system. We connect the two solutions for the primary and the secondary with a dotted line to guide the eye to the difference in the physical parameters that arise from the two solutions. Metallicity and age are set for reference of the whole set of stars and they are not a fit to the T-Cyg1-12664 parameters.