2025 is Tuhon Bill McGrath's 50th anniversary in the Pekiti-Tirsia system. Celebrate with this T-shirt with the 50th logo on the front chest and the PTI Fellowship logos.
• 100% cotton
• Sport Grey is 90% cotton, 10% polyester
• Ash Grey is 99% cotton, 1% polyester
• Heather colors are 50% cotton, 50% polyester
• Fabric weight: 5.0–5.3 oz/yd² (170-180 g/m²)
• Open-end yarn
• Tubular fabric
• Taped neck and shoulders
• Double seam at sleeves and bottom hem
• Blank product sourced from Honduras, Nicaragua, Haiti, Dominican Republic, Bangladesh, Mexico
These garments are listed as "unisex" sizes and may run small. Please check the sizing chart below. These garments are printed and shipped from a Print-On-Demand manufacturer called Printful and they will not accept returns if you have a problem with the size. If there is a serious defect, they will ship you the same item, in the same size, at their discretion.
PTI is not responsible for any returns for this product. However, if you do find a serious defect with the garment when it arrives, send Tuhon Bill a few good pictures of the problem, with a detailed description and he will try and negotiate a replacement for you with Printful. Note: Printful allows itself a one inch margin of error in the placement of design elements, so the garments may be different from what you see here by that amount.
Size guide
| LENGTH (inches) | WIDTH (inches) | SLEEVE LENGTH (inches) | |
| S | 28 | 18 | 15 ⅝ |
| M | 29 | 20 | 17 |
| L | 30 | 22 | 18 ½ |
| XL | 31 | 24 | 20 |
| 2XL | 32 | 26 | 21 ½ |
| 3XL | 33 | 28 | 22 ¾ |
| 4XL | 34 | 30 | 24 ¼ |
| 5XL | 35 | 32 | 25 ¼ |
| LENGTH (cm) | WIDTH (cm) | SLEEVE LENGTH (cm) | |
| S | 71.1 | 45.7 | 39.7 |
| M | 73.7 | 50.8 | 43.2 |
| L | 76.2 | 55.9 | 47 |
| XL | 78.7 | 61 | 50.8 |
| 2XL | 81.3 | 66 | 54.6 |
| 3XL | 83.8 | 71.1 | 58 |
| 4XL | 86.4 | 76.2 | 61.5 |
| 5XL | 89 | 81.3 | 64.3 |