Unisex Blundstones are usually a larger fit than the equivalent UK women's size. As a general rule we recommend that if you're at all borderline on sizing (eg. sometimes a 6, sometimes a 5.5) we recommend dropping down a size (eg. to a size 5) otherwise stick to your normal UK size.
It's also worth bearing in mind that half sizes in Blundstones provide extra width not length so a 5.5 is the same length as a 5, just a bit wider. In practice the sole of both boots is the same, the only difference is that in the half sizes there is more leather in the upper to give a bit more room.
If after trying on the boots you find that they are a bit big but not enough to warrant dropping down a size, you can lift up the footbed of the boots and insert a thin insole underneath. This will give a snugger fit.
The stacked heel women's boots - 1671, 1673, 1677 and 2060 - are basically the same size as the equivalent UK size - so if you're normally a UK 6 you'll want to order a Blundstone 6 in this range.
The thermal range of Blundstones - 584, 566, 1478, 1477 - are all sized up to accommodate the sheepskin insole and so are an even bigger fit than the equivalent non-thermal Blundstones in the same size.
If in doubt...
We realise all of this can sound very complicated. If in doubt please feel free to email or call us (01600 887111). If you give us as much information as possible about your normal shoe size and any issues or variations we can try and help find the best size for you.
If you're still in doubt one option is to buy a couple of different sizes and then return one. We try to as efficient as possible with returns and refunds.
Because Redback are unisex sizes they can be quite roomy for women. Generally we recommend sticking with your normal UK size but if you are at all borderline (eg. sometimes a 6.5, sometimes a 7) it's best to drop down a size.
Half sizes provide extra width not length (so a 9.5 is the same length as a 9 just a bit wider) so unless you have particularly wide feet it's usually best to stick to whole sizes.