The left model shows a cluster of atoms only a few unit-cells across. The field width of the initial 300 pixel wide view is about 29 Ångstroms (or 2.9 nanometers).
A "flat Ewald slice" (kinematic electron diffraction pattern) of the corresponding reciprocal lattice is on the right. Assume that the half-width of the initial view there corresponds to a Nyquist spatial frequency of g = 0.86 cycles per Ångstrom (or 8.6 cycles per nm). Hence a diffraction spot centered on the right edge would correspond to vertical lattice fringes of spacing or periodicity d = 1/g ~ 1.16 Å (or 0.116 nm).
Challenge: By reorienting the specimen with the microscope controls below the display, try: (i) determining the lattice parameters (a, b, c, &alpha, β γ) for this crystal in terms of its standard basis triplet, and/or (ii) capturing a <110> zone diffraction pattern & indexing the spots in it. How many such zones are there? Here are calculators that might come in handy for the left and right sides of the figure.