Accurate measurements are key to finding your ideal shoe size and width. Follow these simple steps:
- Measure Foot Length
Stand barefoot on a flat surface with your full weight evenly distributed. Using a ruler or tape measure, record the distance from the back of your heel to the tip of your longest toe (this may be your big toe or second toe). - Add Room for Comfort
Add 10 mm (≈ 3/8 inch) to your measured foot length. This extra space ensures natural movement and proper fit—this final number corresponds to the ideal footbed length for sizing. - Measure Foot Width
Measure across the widest part of your foot (typically the ball of the foot). Compare this width to the footbed dimensions for your calculated size. If your foot is narrower than the standard footbed width, consider a Narrow fit; otherwise, Regular is recommended.
Trying on a new pair: Follow the conversion guide to get the correct fitting
Breaking in a new pair: Allow your feet to adjust to your new shoes by limiting wear to just a few hours the first five to six times.
More help with fit and care: read our Fit & Care guides
| Adults | |||||
| Birkenstock Size | Length | Width Regular | Width Narrow | AU Women | AU Men |
| 35 | 225mm | 89mm | 85mm | 5 | |
| 36 | 230mm | 91mm | 87mm | 6 | |
| 37 | 240mm | 93mm | 89mm | 7 | |
| 38 | 245mm | 95mm | 91mm | 8 | |
| 39 | 250mm | 97mm | 93mm | 9 | 6 |
| 40 | 260mm | 99mm | 95mm | 10 | 7 |
| 41 | 265mm | 101mm | 97mm | 11 | 8 |
| 42 | 270mm | 102mm | 99mm | 12 | 9 |
| 43 | 280mm | 103mm | 101mm | 13 | 10 |
| 44 | 285mm | 107mm | 103mm | 11 | |
| 45 | 290mm | 109mm | 105mm | 12 | |
| 46 | 300mm | 113mm | 107mm | 13 | |
| 47 | 305mm | 115mm | 109mm | 14 | |
| 48 | 310mm | 117mm | 111mm | 15 | |
| 49 | 315mm | 119mm | 113mm | 16 | |
| 50 | 325mm | 121mm | 115mm | 17 | |
| Kids | |||||
| Birkenstock Size | Length | Width Regular | Width Narrow | UK | |
| 24 | 150mm | 63mm | 63mm | 7 | |
| 25 | 160mm | 69mm | 65mm | 8 | |
| 26 | 165mm | 71mm | 67mm | 8 / 9 | |
| 27 | 170mm | 73mm | 69mm | 9 | |
| 28 | 180mm | 75mm | 71mm | 10 | |
| 29 | 185mm | 77mm | 73mm | 10 / 11 | |
| 30 | 190mm | 79mm | 75mm | 12 | |
| 31 | 200mm | 81mm | 77mm | 12 / 13 | |
| 32 | 205mm | 83mm | 79mm | 13 | |
| 33 | 210mm | 85mm | 81mm | 1 | |
| 34 | 220mm | 87mm | 83mm | 2 | |
More help with fit and care: read our Fit & Care guides
Protect the Upper: Apply a water- and stain-repellent spray suitable for your material (e.g., leather, suede, or nubuck) every few months or as needed to enhance durability and resistance.
Oiled leather protection: apply a Leather Conditioner to keep it supple
Cork protection: apply a Cork Sealer to maintain its integrity
Air Footbeds Regularly
Remove the footbeds (if removable) and let them air out in a well-ventilated, shaded area. This helps reduce moisture buildup and prevents odor.
Avoid Immersing Cork Models in Water
Cork footbeds and soles can warp, crack, or lose structural integrity when soaked. Never submerge your sandals—wipe clean with a damp (not wet) cloth only.
Keep Away from Extreme Heat
Prolonged exposure to high temperatures (e.g., direct sunlight, car interiors, radiators, or fireplaces) can dry out cork, crack the sole, or weaken adhesives.
Repair, Don’t Replace
Birkenstocks are built to last—and many components (soles, heels, straps, footbeds) are repairable. Visit an authorized repair service to extend the life of your footwear sustainably.
More help with fit and care: read our Fit & Care guides
Shipping costs
We ship within Australia only, via Australia Post.
Standard Post: $12.00. Free on orders over $250.
Express Post: $18.00 on all orders.
Dispatch
Orders placed before 3:00 pm (Hobart time) on a business day are dispatched the same day. Orders placed after 3:00 pm, or on weekends and public holidays, are dispatched the next business day.
Delivery times
Delivery times start from dispatch and depend on your location:
Standard Post: 1–7 business days. Most capital cities receive orders within 1–4 business days, and regional and remote areas within up to 7 business days.
Express Post: 1–3 business days. Next business day delivery is available to many metro areas.
These estimates are in line with Australia Post’s service standards.
Holiday periods
During Christmas, New Year and major public holidays, delivery times may be longer. We’ll publish shipping cut-off dates on our website and by email ahead of major holidays. Please check Australia Post’s cut-off dates as well, since orders placed after those dates may not arrive before the holiday, even with Express Post.
Receiving your parcel
Please choose a delivery address where someone can accept the parcel. If no one is home, Australia Post may redirect it to your local post office or parcel locker.
Stock availability
If a product can be added to your cart, it’s in stock. If an item becomes unavailable after you order, we’ll contact you by email or phone with the expected availability, or offer a full refund.
Order hasn’t arrived?
If your order hasn’t arrived within the delivery time above, please contact us on (03) 6224 7688 or at icon@iconfootwear.com.au, and we’ll track it down for you.