Radius-velocity relation of the clumps in A1689-zD1 compared to giant molecular clouds (GMCs) in the Milky Way (Heyer et al. 2009), in the nearby spiral M64 Rosolowsky & Blitz (2005), a compilation of other low redshift galaxy GMCs (Bolatto et al. 2008), in the so-called Cosmic Snake at z = 1.0 (Dessauges-Zavadsky et al. 2019), and in the clumpy, lensed SPT 0311−58 at z = 6.9 (Spilker et al. 2022). Lines of constant surface mass density are shown, following Spilker et al. (2022). The clumps in A1689-zD1 have a high surface mass density, 1.5 dex higher than low-z GMCs and similar to SPT0311−58 and the Cosmic Snake, though with clump sizes that are factors of several smaller than in the more massive galaxy SPT 0311−58 and much larger than observed in less star-forming galaxies at lower redshift. Our smallest components are unresolved, indicating the possible presence of even smaller clumps, possibly corresponding in size to those in the Cosmic Snake or M64.