Red Tape Shoes - Size?

Hi Dimers

I have not used a red tape shoe ever before but willing to buy one.

Any idea about the size? I checked the size details on myntra and size 8 of different brands differ a lot in terms of feet size in centimeters

Generally size 8 fits for me.

But seems red tape size 8 is a bit smaller than other brands (26.7 cm)
Spalding / adidas size 8 is 28.1 cm
Bata Size 8 is 27.1 cm

Bata Size 8 fits well for me.

Plz guide

Should I order size 8 or 9 for red tape.