





Estimating Martlet's Weight
Howdy! I'm uh... well, not really well known for it, but a lot of people saw me estimate Martlet's weight in a comment a while ago. But, that old estimate had a lot of problems, so... here's a new and improved estimate, along with my reasonings for it. Also, NO AI WAS USED IN THIS POST WHATSOEVER, not for calculations, not for the title, not for the pictures, nothing. Also, this calculation was done for Martlet's old overworld sprites, not her updated ones. I believe they are the same height, but I'm unsure.
So, first off, the problems with my previous calculations. I essentially imagined Clover as 12 years old, and the average height of a 12 year old is 5 feet. I then assumed Martlet to be around 7 feet tall, and then scaled a bluejay to around that height. The problem with that, is that a bluejay at that height would be WAY bigger than Martlet.
Also, I pretty much just assumed Clover was five feet tall. So, first, we figure out Clover's height. So, we do know that Martlet implies Clover will be fully grown when the monsters leave the underground. So, since we know enough time has passed between Undertale Yellow and Undertale for most monsters to forget what a human looks like, we can assume it has been several years. For the sake of this, we'll assume Undertale Yellow takes place eight years before the events of Undertale. It's long enough for most monsters to forget what humans look like, and, its about as long as it took Undertale Yellow to release after Undertale.
So, assuming Clover reaches fully grown around the time Undertale takes place, we can get an estimate on Clover's potential height during Undertale Yellow, and also age.
If Clover is a biological female (since Clover's actual gender isn't confirmed, I'll just be using their biological sex to estimate heights)- They should stop growing at around 15. So, that means Clover is around 7 years old as of the events of Undertale Yellow.
If Clover is a biological male- They should stop growing at around 18, so Clover is around 10 years old.
In either scenario, taking the average weight and height of Clover leads to Clover being somewhere between seven and ten years old, between four feet and 4 foot 8.
So, we know Clover is 30 pixels tall in Undertale Yellow, so one pixel is anywhere between 1.6 inches (four centimeters) and 2 inches (five centimeters). Martlet is 53 pixels tall (in her overworld sprite), so martlet is anywhere between 7 feet (85 inches, or 216 cm) and just under 9 feet tall (106 inches, 270 cm).
So, let's go back to the bluejay estimate (even though Martlet is NOT a bluejay, this is just used for feather covering, bone structure, etc), assuming Martlet is eight feet tall. Assuming you took a bluejay and made it eight feet long, it's pretty similar in size to Martlet. The average bluejay is around a foot long, so scaling it up to seven feet, Martlet would weigh 343 times that. If eight feet, 512 times that. If 9, 729 times that.
So, in total, Martlet is between seven and nine feet tall, and anywhere between 1200 ounces and 2552 ounces, or, between 75 and 160 pounds (34-73 kg).
TL;DR: Martlet is between 7 to 9 feet tall, and between 75 and 160 pounds (34-73 kg). If she's eight feet tall, she weighs around 112 pounds (51 kg).