Compression Sock Size Chart

Yes. Apolla offers dedicated WIDE sizing in the Infinite (mid-calf) and Endurance (knee-high) styles, specifically designed for customers whose calves don't fit standard compression socks comfortably. The WIDE options accommodate wider calf circumferences while delivering identical APMA-accepted 20-30 mmHg therapeutic compression and patented arch support technology. Same medical benefits, better fit.

Standard compression socks create a specific problem for wider calves: the tight band at the top cuts into skin, leaves marks, and becomes so uncomfortable that people stop wearing them. This defeats the entire purpose. Compression only works if you actually wear it. WIDE sizing solves this by providing more circumference around the calf without reducing compression effectiveness at the foot and ankle where therapeutic pressure matters most.

The trade-off is style availability. WIDE only comes in the Infinite and Endurance, not the ankle-length or no-show options. If you need wider calf sizing and prefer shorter styles, the Joule or AMP won't accommodate. For those customers, wearing the WIDE Infinite and folding down provides a workaround, though it's not ideal.

To determine if you need WIDE, measure your calf at its widest point and compare to the size chart. The chart shows standard and WIDE ranges side by side. If standard leaves you borderline or uncomfortable, WIDE removes the squeeze. The 90-day exchange policy means you can try both and return whichever doesn't work. As one lymphedema patient found. "Buy these socks! My regular medical grade compression socks would still leave me with some swelling, not to mention they would squeeze my toes. Not with Apolla!" (Tracey S.) Wide calves deserve wide options.

Your shoe size is your compression sock size. Apolla's sizing runs XS through XL based on standard shoe sizes, so most customers skip the tape measure entirely and order their usual size. The American Podiatric Medical Association reviewed Apolla's sizing system as part of their Seal of Acceptance evaluation, confirming the fit delivers consistent 20-30 mmHg therapeutic compression across all size ranges.

For crew and ankle styles like the Performance Shock or AMP, your shoe size handles everything. Knee-high styles like the Endurance require one additional step: measure your calf at its widest point to determine whether standard or WIDE sizing fits better. WIDE options accommodate larger calves while maintaining identical compression and patented arch support technology.

The real sizing risk isn't measurement error. It's hesitation. Many customers delay ordering because they worry about getting the wrong size, when the solution is simple. Apolla offers free exchanges within 90 days. Order your best guess, wear them, and swap if needed at zero cost. This policy exists because the difference between "almost right" and "perfect" determines whether you wear them once or daily.

If you're genuinely between sizes, the size chart includes calf measurements alongside shoe sizes. Prefer snugger therapeutic feel? Go smaller. Prefer relaxed comfort? Go larger. Both deliver the same APMA-accepted compression. As one customer put it. "I ordered compression socks off of Amazon because they were cheaper. They were so tight it hurt to walk. The Apolla sock fit my swollen feet so much better." (Connie A.) Measure once. Wear daily.

Measure in the morning. Swollen ankles change size throughout the day, expanding as fluid accumulates during activity and gravity. Morning measurements capture your baseline before swelling begins, and this baseline determines your correct Apolla size. The APMA-accepted 20-30 mmHg graduated compression then actively works throughout the day to prevent swelling from building and push accumulated fluid back toward your heart.

The common mistake is measuring when ankles are already swollen and ordering a larger size to accommodate the swelling. This creates a fit problem. When swelling reduces (which compression helps achieve), the socks become too loose to provide therapeutic pressure. You end up with socks that fit your swollen state but don't compress your improving state. Better to size for your baseline and let compression do its job.

For significant ankle swelling, consider the Infinite mid-calf or Endurance knee-high rather than ankle-length options. Extended coverage means more surface area for graduated compression to work, and the continuous pressure from ankle through calf moves fluid more effectively than ankle compression alone. WIDE sizing is available in both styles for those who need more room around the calf.

People with lymphedema, chronic edema, or post-surgical swelling should consult their healthcare provider before starting compression therapy to confirm 20-30 mmHg is appropriate for their condition. Severe peripheral artery disease may require different compression levels. One customer with ongoing swelling issues shared. "My swelling was non-existent when I took it off." (Irene H.) Morning measurement, daily compression, evening relief.

Check your calf measurement. When shoe size leaves you straddling two options, calf circumference becomes the deciding factor. Apolla's detailed size chart cross-references both measurements, and the combination usually points clearly to one size. The APMA-accepted 20-30 mmHg graduated compression works across the full size range, so both adjacent sizes deliver therapeutic benefits.

Here's the deciding question: how do you want them to feel? For snugger compression with maximum therapeutic pressure, pick the smaller size. For relaxed all-day comfort with easier on-and-off, pick the larger. Neither choice is wrong. Both compress effectively. The difference is sensory preference, not medical outcome.

The real problem isn't being between sizes. It's letting uncertainty delay relief. Apolla's 90-day exchange policy with free return shipping exists precisely for this situation. Order your best guess, wear them during actual activity, and exchange if they're not quite right. No cost, no hassle, no lectures. Many customers order two sizes initially and return whichever doesn't fit, which eliminates the guesswork entirely.

One thing to avoid: don't let tight calves push you into a too-large foot size. If your calf measurement says size up but your foot swims in that size, consider the Infinite or Endurance in WIDE. Same foot fit, more calf room. As one customer discovered after trying cheaper alternatives. "You get what you pay for." (Connie A.) Between sizes isn't a problem when exchanges are free. Pick one, try it, adjust if needed.