I’m using Gildan's most popular Heavy 'G5000' shirt for this, to keep a friendly price-point, as well as a quicker shipping solution (to avoid preorders) – These shirts are made on demand, as soon as you place your order, via third-party fulfillment.. See below for shipping times of the countries I currently ship to.

• 100% cotton
  Direct-to-Garment print on front
  Heavy Fabric weight: 5.3 oz/yd² (180 gsm)
  Double seam at sleeves and bottom hem
  Fits true to size. However since it’s 100% cotton, please expect the usual shrinkage after first wash (if you are a “tweener”; in between sizes)

  Please note, orders that contain multiple products may be shipped separately

Shipping (please allow 1-3 business days for manufacturing):

• USA:  4–6 business days

  Canada:  11–12 business days

  UK: 11–12 business days

  Australia: 6–9 business days
  Netherlands: 6–8 business days

  Spain: 11–12 business days

  Sweden: 11–15 business days
  Denmark: 11–15 business days
  Germany: 6–9 business days

  New Zealand: 10–12 business days