
Then hit Send to Silhouette to cut the black HTV. Make sure to change your blade to match the setting of 2. This will display the blade depth, speed and thickness for the cut. Choose the default settings for Heat Transfer Material – Smooth. In SS, go to the Silhouette menu and choose Cut Settings…. Whatever is on the design page (white area) will be cut so move the cardinal design and rectangular box off the mat. The shiny plastic side of the HTV is loaded facing down into the machine. Turn on the Portrait and use the load media button to load the black HTV into the Portrait. Then use the rectangle tool to draw one rectangle around each color group. Notice how the design on the left is one “group” while the design on the right is six “groups.” Next, use the selection tool to move the different groups by color. Select the design, right click and choose Ungroup. I like to save HTV so I am going to group the design by color. You can cut the black and the cardinal HTV how it is laid out in the design but that would leave a lot of blank space. Two different colors of HTV will be cut for this Harry Potter onesie design. So the first thing to do is to select the entire design, right click and choose Flip Horizontally. When using heat transfer vinyl, the design cut needs to be a mirror image of how the design will look when adhered. I am not sharing my cut file for the Harry Potter onesie because I used a personal use font ( Harry P) to create my design. Open the design in Silhouette Studio (SS). I always wash any clothing items before I use them for a craft. onesie design file for Silhouette Studio.heat transfer vinyl in black and cardinal.

Then I discovered how easy it is to use! This Harry Potter onesie tutorial is detailed but the entire process takes about 15 to 20 minutes.

I have used HTV for a lot of my Silhouette projects. Be sure to scroll down to the bottom of the post for dozens of vinyl projects ideas with Expressions Vinyl and a giveaway that will make any Harry Potter lover swoon.


I thought the quote would be perfect on a baby onesie because of the words born and grow. One of my favorite Harry Potter quotes is “It matters not what you are born but what you grow to be.” by Dumbledore from Harry Potter and the Goblet of Fire. I felt compelled by my love for Harry Potter to participate in the Harry Potter series by Rae Gun Ramblings. My friends gave me Harry Potter and the Sorcerer’s Stone as a birthday gift and began my obsession with Harry Potter. I am over the moon when my love of reading and crafting collide. This Harry Potter onesie project using heat transfer vinyl (HTV) is sponsored by Expressions Vinyl but all designs and opinions are my own.
