A method includes heating a hollow-core preform comprising an outer tube and an inner tube. The outer tube includes an inner radius r.sub.ocp and an outer radius R.sub.ocp. The inner tube includes an inner radius r.sub.cp and an outer radius R.sub.cp. The method further includes drawing a hollow-core optical fiber from the hollow-core preform at a draw tension T.sub.g in grams, thereby elongating the outer tube into an outer cladding of the hollow-core optical fiber and the inner tube to a capillary of the hollow-core optical fiber. The draw tension T.sub.g and/or a differential capillary pressure p.sub.c are selected at least in part based on a non-dimensional parameter

[00001]$X_1=\frac{3\left(R_{\mathrm{ocp}}^2-r_{\mathrm{ocp}}^2\right)R_{\mathrm{cp}}\left(p_c{r}_{\mathrm{cp}}-2{}_c\right)}{4{\mathrm{Tr}}_{\mathrm{cp}}\left(R_{\mathrm{cp}}-r_{\mathrm{cp}}\right)},$

where T is the draw tension in dynes and T=981T.sub.g, p.sub.c is in dynes/cm.sup.2, .sub.c in dyne/cm is a surface energy of a glass material forming the inner tube, and 0.5X.sub.10.75.

A method may include: feeding a hollow-core preform into a draw furnace at a preform feed rate V.sub.p; heating the hollow-core preform comprising an outer tube having an inner radius/diameter r.sub.p/ID.sub.preform and an outer radius/diameter R.sub.p/OD.sub.preform; and drawing a hollow-core optical fiber from the hollow-core preform at a fiber draw rate V.sub.f and a draw tension , thereby elongating the outer tube of the hollow-core preform to an outer cladding of the hollow-core optical fiber having an inner radius/diameter r.sub.f/ID.sub.fiber and an outer radius/diameter R.sub.f/OD.sub.fiber; wherein: the interior cavity of the outer tube is under a differential core pressure P.sub.core, the differential core pressure P.sub.core, the inner and outer radii r.sub.p and R.sub.p of the outer tube are selected such that a tight control over target inner and outer radii r.sub.f and R.sub.f and a fiber dimension sensitivity ID.sub.fiber of the outer cladding can be achieved.