Big Difference in Sizes
344856
My daughter is 13 months old wears about a size 3 shoe and has feet on the chubbier side:)
I was so dissapointed when I realized how large the slippers are! Especially since they are so so adorable.
I ordered size 12-18 months, but should have have got the 6-12 months like I had ordered for a different pair of Robeez that actually fit perfectly.
Hope that helps someone!
~update~
My daughter is 18months today and the slippers are still very large, but now she won't trip over them(fourth and third picture)! The first picture is of a different robeez slipper I purchased in size 6-12months(my daughter wears a 4.5-5 shoe. And the 6-12 month fit her perfectly...but that shows a comparison between the 12-18slippers robeez bunny slippers  and the 6-12 month robeez bootie slippers....  I saw a question asking the material on the inside so I posted the picture below(second one) on the slipper turned inside out.
1553501
I bought this same shirt in black and it's a completely different shirt.  The black one fits great but the white one is waaaay longer for some reason, even though the tags say they're the same size.  White one is about 4 inches longer in the torso.  Not sure what's going on there.
311822
Levis sizing has become quite a challenge.  Went to a store and tried on a number of pair in my normal size (34/32), all style #527, but different blues. Each and every one fit differently; all varying degrees of too small and/or too short, despite the tag indicating that all were 34" waist and 32" length. Tried on size 36, in that style, and they seemed to fit. They did not, however, have my length so I ordered 36/32 from Amazon. These are huge. I feel better in one sense (my size did not, in fact, increase), but it should not take this much time and effort to purchase a pair of jeans.
1537431
The sizing on these is strange - I ordered my 2yr old daughter a 6/7 since that's what she's wearing in all other shoes. They fit perfectly today but I wanted a bit more room to grow for the summer...we have an 8/9 also and the size difference between the two is unreal! She'd be tripping all over with the huge 8/9 so we stuck with the 6/7 even though she'll outgrow before summer's end.
3011591
These socks are adorable, and were shipped much sooner than I expected.  Unfortunately, the socks that came to me were two different sizes.  I ordered newborn size, but I got what appears to be one newborn and one size larger.  They do not match.  I would have to pay to return them, which would not be worth the price, so I will probably just have to throw them away.
2436327
The first pair I purchased was a size 7 that fit my daughter fine (ran small but the reviews had said that). So when she grew out of them, I bought a 9. When they were delivered, they were practically the same size as the 7...so I returned them and got size 10....which are HUGE. I will save them for her to grow into but something is very off with the sizing.
3303613
I've bought this item couple months ago, but this time the top are different brand and quality. The size is different. I've ordered XL and it's M.
4305758
Be careful, the different sizes are completely off !
I have a medium male dalmatian (50 pounds), and I originally ordered a large hoodie. When I got it, I couldn't even close the front scratch, and I was afraid to break my dog's legs when I took it off. It was so tight and way too small, that I ordered a XXL. When I got that one, I put it on, and it was ridiculously big. The hoodie would almost cover his whole tail... So after sending those two back, I was finally happy to figure out that XL should fit perfectly, but that wasn't the case at all. The problem is the cut itself which is actually badly done. The XL size is okay but the front is still very tight on his front legs so he cannot lay down comfortably...
So, in short, don't trust the size measurements, and the cut doesn't seem to be very well thought. It must only fit a certain type of dogs, and probably more like small ones such as this French bull dog on almost all the pictures (no matter what's the size they are selling...).
To their defense, the fabric is really nice.

Ps: on these photos, Luda is wearing a LARGE hoodie.
2549024
Why aren't they all the same size. The blue t shirt is shorter by 3 cm. That s a lot at this age.
4657161
The sizes are not consistent. I've bought multiple pairs of the same size and some are almost two inches bigger in the waste.
2083450
Based on previous orders ordered in this size, the ones we just ordered were huge in comparison. I don't know if they were miss labeled or just are made that way now.
3370776
A large size is the same as an extra small. Very unhappy with this purchase.
845791
I didn't realize the difference. Good quality but too big. Next time would drop a size. A shame as I love them.
1542936
Each one was a completely different size. I understand some discrepancy but this is way off. A few fit but some are tiny.
1204063
The sizes are strange.  Too many too small and rhe big ones are too big.
2130532
These are much smaller than the large ones I bought before
236817
the items seem to be running tighter than the size indicated