Do the woom GO sizes 1 to 4 correspond to those of the woom ORIGINAL bikes?

Yes, the sizes of the woom GO wheels and bikes are the same as the woom ORIGINAL. 

• The smallest balance bike, the woom GO 1, has 12″ wheels and is designed for children who are between 31 and 40 inches tall (roughly 18 months to 3.5 years old).
• The woom GO 1 PLUS balance bike with 14″ wheels and the woom GO 2 with 14″ wheels (the smallest bike with pedals) are designed for children who are between 37 and 43 inches tall (roughly 3 to 4.5 years old).
• The woom GO 3 and woom GO 3 AUTOMAGIC bikes with 16″ wheels are designed for children who are between 41 and 47 inches tall (roughly 4 to 6 years old).
• The woom GO 4 with 20″ wheels is designed for children who are between 45 and 50 inches tall (roughly 6 to 8 years old).