MSD sized Vinyl Platforms with double buckle.  The buckles are tiny but we found that you can do up the buckles and then slide the foot in through the back for an easy on off and then adjust the straps through the buckles for tightness.  The buckles can also be criss crossed to form an "X" over the foot if you prefer.
 
Size:
Interior of the Shoe:
Length: 5.5cm
Width: 2.5cm at the largest top and 2cm at the back
Exterior:
Length: 7cm 
Width: 3 cm at the largest top and 2.5cm near the back 
Height: 3.5cm

Fit:
Universally sized to fit most 45cm or 1/4 BJD or Mini Girls or MSD Dolls.  Even though the exterior has a 7cm length, it will not fit a Smart Doll or 1/3 scale doll, the interior is too small.  If you have an MDD doll with 7cm length feet it will not fit.
 
Note for Minifee Dolls: 
A bare Minifee doll foot is about 5cm long and 2cm wide at the front and 1cm wide at the back generically speaking, so there is a small amount of space completely around the foot when inserted barefoot into the shoe room enough for socks or tights.  If no socks or tights are worn the doll's foot has the ability to shift or is loose when carrying and such.  The platform makes it a bulky looking shoe so it looks best with a loose fit pant, long skirt, etc.  It wouldn't be my choice to go with leggings or tight jeans as it starts to make the leg of the doll look really skinny and the shoe look really clunky and wide.
 
Listing is for shoes only.  Other accessories shown are just for effect and do not come with the shoes.