Ages of the characters.
Mane seven and Spike:
Sunset Shimmer. Time in the EQ world runs much slowlier than time in real Equestria. She is taken by Celestia as her personal student at the age of 8 and runs throught the portal when she's 15. She's at least 10 years older than Twilight, so if she stayed in pony world she would be 30 at least, but as the time runs slowlier in EQ world, she around 25).
Rarity (21 at the start of the show, 24 in 6th season). She owns boutique and lives separatly from her parents.
Applejack (20 at the start of the show, 23 in the 6th season). She seems to be the most mature of mane 6, but this could be caused by the untimely death of her parents.
Fluttershy and Rainbow Dash (19 at the start of the show, 22 in the 6th season). They are obviously peers. And Rainbow as celebrating her 21th birthday in "Pinkie's Pride".
Twilight Sparkle (19 at the start of the show, 22 in 6th season). She feels younger than other mane 6 for me, but yet not a teen.
Pinkie Pie (18 at the start of the show, 21 in the 6th season). She's year younger than Flutters.
Spike (12 at the start of the show, 15 in 6th season). Teen. He still does a lot of immature stuff and obviously is younger than mane 6. I imagine Twilight hatched him when she was 6.
Scootaloo, Sweetie Belle, Applebloom, Diamond Tiara, Silver Spoon, Dinky, Pipsqueak, Snips and Snails (10 at the start of the show, 13 in the 6th season). They are classmates, so they are most likely peers.
Babs Seed (13 in 3rd season, 15 in the 6th season). For me she seems older than CMC. Babs is late bloomer.
Big Mac (25 at the start of the show, 28 in the 6th season).
Soarin and Spitfire (23 at the start of the show, 26 in 6th season).
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