A mi medida literally means "to my measure". It's a wonderful idiom used to say something is a perfect fit, as if it were custom-made.
In the song, the singer describes his partner as being "hecha justo a mi medida" (made exactly to my measure). He's using this phrase to express the feeling of finding a soulmate, someone who fits perfectly into his life. It’s a much more poetic and heartfelt way of saying "you're perfect for me."
Julión Álvarez y su Norteño Banda bring us a warm, unapologetically sweet Norteño love ballad with "Regalo De Dios" (Gift from God). The track kicks off with pure morning gratitude, where the singer wakes up next to his partner and feels so lucky that all his worries disappear: "Cuando me siento en tus brazos se me olvida todo" [When I feel myself in your arms I forget everything]. He describes her as "hecha justo a mi medida" [made just to my measure], a lovely Spanish idiom meaning she fits his life like custom-tailored clothes. Best of all? He never went out begging for love. She showed up out of nowhere—"solito me llegó" [it came to me all on its own]—making her feel like a divine blessing that counts twice over.
The rest of the song turns into an open promise of lifelong dedication. He signs himself up for full protection duty, swearing "Voy a ser el encargado de cuidarte siempre" [I will be in charge of always taking care of you] through good times and bad ("En las buenas y en las malas"). It sounds heavy, but he keeps his ultimate goal wonderfully simple. His entire payment for this lifetime of devotion is just watching her smile: "La recompensa para mí / Es mirar tu linda carita sonreír" [The reward for me is watching your pretty little face smile]. It is straightforward, sincere romance backed by crisp accordion and brass beats.